Free Essay

Adding Resultant Force and Equilibriants Force

In: Other Topics

Submitted By amalina
Words 1153
Pages 5
| |Academic & Professional Qualifications: |
| |BSc (Eng), MPhil (H.K.); MBA (C.U.H.K.); PhD[PolyU (H.K.)], MemACM; MemASME; MemIEEE |
| | |
| |Research Interests: |
| |Mechatronics; computational intelligence; computer vision. |
| | |
| |FG638 |
| |Tel: 2766-6659 |
| |E-mail: mmdwyuen@polyu.edu.hk |
| | |
|PROJECT BASED LEARNING |
| |
|David YUEN |
|Department of Mechanical Engineering, The Hong Kong Polytechnic University |

INTRODUCTION

This subject is called Mechatronics where a continuous assessment method is incorporated. This subject is mainly offered in Year 2 of the Higher Diploma program. Since the class size is quite big that we usually have 40+ students, the whole class is split up into 2 groups. Further, they have to form small groups 2-3 students per group to work on the mini projects. In this subject, students have to complete a mini project in order to pass this subject.

This subject consists of principles of mechanics, electronics, microprocessor, actuator, and sensor together. If you teach this subject in a conventional way that you teach each component separately, the contents are easy to get loose. However, if you use a project to integrate these components altogether, the contents are bonded closely together. The project-based learning approach aims at encouraging students to create, training them to become more confident in problem solving, improving their management and communication skills, encouraging them to find information on their own, increasing their awareness of the importance of integration concept and enabling them to integrate different principles and skills.

pREPARATION

Before using this approach, some final projects of the same topic had been done. These projects provided a framework for this subject using the project-based approach, and that gave the lecturer ideas on what preparation work should be done beforehand. As for the resources, the department supplies all required equipment while the students pay for the materials. However, payment can be reimbursed up to $1,000 per group.

IMPLEMENTATION

For every week, a 3-hour workshop, replacing lecture and tutorial which, takes place in the laboratory. The course in the first few weeks is structured and guided. Each week will cover a different topic and then students have to do exercises, which are related to the topic covered every week. The knowledge covered in these few weeks is highly related to what students should have learned before doing their projects. In short, students are expected to acquire the basic skills within this period. In the meantime, each group has to submit a proposal of the project design including the robot design and the project schedule. The first come first in policy is adopted to avoid duplication of project ideas and encourage innovation. Once the lecturer has received the proposals from different groups, he would challenge the design and judge the feasibility of the project. The lecturer will also give each group suggestions on the design in order to make the project more manageable. In the mid-term, each group is required to do a presentation on the work progress of the project. During the presentation, besides briefing the class on the product design, each group has to explain the functions of the main electronic parts to be used in the product. Students are required to use PowerPoint to present their projects and all presentations must be done in English. This mid-term presentation helps each group and the lecturer to monitor the progress of the project. This also helps maintain the quality of the whole project. Throughout the whole process, students encounter many problems that they need to identify the causes of the problems and explain how these problems can be solved. At the end, each group has to present their project. They are required to demonstrate the final products. Besides, they need to use PowerPoint to explain the structure of their products and share their experience with each other. In the final presentation, each group member has to present at least one part so as to allow the lecturer to evaluate the presentation skills of individual student.

rOLE OF LECTURER

Throughout the whole process, the lecturer acts as a facilitator to monitor the progress of the project to make sure all projects are running at the appropriate pace and guide or work with the students to find information from different sources instead of passing the information to the students directly. Later on, a certain amount of autonomy will be given to the students so as to give them more space to create. Since mostly students work on their projects outside classroom hours, the lecturer would be happy to stay in the laboratory to help the students to solve any problem related to their projects.

Assessment

Besides a number of presentations, each group has to submit a project product (i.e., a robot) and a written report to pass the subject.

1 PRESENTATION

In the very beginning, each group has to present their proposed project ideas and the robot design. Later, all groups have to present once again as a mid-term oral report on the progress of their projects. At the end of the course, each group member in the final presentation has to take up at least one part so as to allow the lecturer to evaluate the presentation skills of individual student. Therefore, the final grade of the members of the same group may vary.

2 PROJECT PRODUCT

Each group at the end needs to submit a small toy robot as partial fulfillment of this subject. The final product should at least have the basic functionalities set out in the subject. If the robot has these basic functionalities, the group will pass the subject without difficulty. Certainly, students can add in some more functionalities to make their products more outstanding. Then, they will have the chance to get higher marks. Other than functionalities, assessment criteria for the final product also include creativity, complexity and appearance.

3 PROJECT REPORT

Each group has to submit a 10-page final report to layout the structure of the project and to give detailed explanations about the product design. Guidelines are provided to the students to help them write up the report.

At the end, each group has to fill out a form to explain the amount of contribution of each group member amongst the group. It is difficult to find out the truth but it is easy for the lecturer to judge by daily observation.

Student Feedback

• Students are willing to spend extra time on their projects. • The Student Feedback Questionnaire shows that students favor the project-based learning approach. • Students commented that they gained a sense of success from the project in which they had to create a robot on their own. • The experience gained from the project also makes the students become confident handling their job in toy industry.

A Piece of Advice

• Should have some experience of leading a similar project before. • Try best to get sufficient supports and resources from your department. • Capable of handling different types of problems.…...

Similar Documents

Premium Essay

Excessive Force

...Journal Article Analysis Week eight: Chapters 26 - 29 Use of force Article in text: How Reasonable Is the Reasonable Man?: Police and Excessive Force Author(s): Geoffrey P. Alpert and William C. Smith. Source: The Journal of Criminal Law and Criminology (1973), Vol. 85, No. 2 (Autumn, 1994), pp. 481-501 Published by: Northwestern University Notable Points I want to discuss / Point of View Observed from each reading: 1. What is excessive force is the main issue or topic being discussed in this article. The author clearly shares the same concern policemen and citizens have. There is really no clear set definition on how to describe when certain force is appropriate. The author takes a side in that officers and citizens need to educate themselves in knowing both roles of each other; so they can better understand the extremely different situations police officers are in. By understanding the civilian and the civilian understanding the role of an officer it helps with defining the reasonable person. It is a totality of situational circumstances and ethical acceptability which must be evaluated to determine if force used by a police officer is reasonable. My assessment: For my personal opinion on this point I would agree with the author partially, being a police officer you do not know when a regular situation...

Words: 734 - Pages: 3

Premium Essay

Five Forces

...industry To begin with the purpose of the particular essay will intend to give an explanation about the Porter's five forces. However the discourse will focus on the sixth force and what affect has. The first part of the discussion will be analysed and supported by arguments about the meaning of Porter's five forces. Nevertheless examples for the five forces will mentioned in order to support and take thesis in the particular analysis. However examples about the sixth force will be mentioned in order to give the reader a satisfactory explanation and to make clear the effect that have in airline industry. Afterwards the essay will analyse the future of the airline industry. Finally a conclusion gives the reader a summarizing about the aspects discussed on the analysis. The Airline Industry has changed the people’s life. In addition it has drop the travel time and decrease the distances making possible to visit lands that cannot be imagined in the past. Michael Porter had created a model showing the influence on industry by five forces. This model help the managers to understand better the strategic forces that appear on industry and how they affect profitability. Five forces analyzing five key areas namely competitive rivalry, the threat of substitutes, the threat of entry, the power of buyers and the power of suppliers. Furthermore Porter referred to these forces as the micro-environment, to contrast it with the more general term macro-environment. Airline industry......

Words: 2673 - Pages: 11

Premium Essay

Magnetic Force

...Experiment 31: Magnetism Purpose To study the relationship between magnetic force and the magnitude of the current, length of the wire, strength of the magnetic field, and the angle between the field and the wire. Apparatus SF-8607 Basic Current Balance (Main Unit, 6 Current loop PC boards, Magnet Assembly with 6 magnets), DC power supply, DC ammeter, Balance, Lab Stand, hook-up wires with banana plug connectors Theory A current-carrying wire generates a magnetic field surrounding the wire. When this wire is placed in an external magnetic field, it experiences a force due to the poles of the two magnetic fields interacting. The magnitude and direction of this force depends upon four variables: the magnitude of the current (I) in the wire; the length of the wire (L) that is placed in the external magnetic field; the strength of the external magnetic field (B); and the angle between the direction of the wire and the direction of the magnetic field ((). This magnetic force can be described mathematically by the vector cross product: Fm = I L X B, (1) for which the magnitude is: Fm = I L B sin (θ). (2) With the SF-8607 Basic Current Balance, you can vary the three quantities in (2), namely: I, L, and B. The resulting magnetic force between wire and field can then be determined through the simple calculation. By adding the SF-8608 Current Balance Accessory, you can also vary the angle between the......

Words: 1262 - Pages: 6

Premium Essay

Force Convection

...nonzero streaming motion in the field away from the body surface, caused perhaps by a pump or fan or other driving force independent of the presence of the body. Also in this class are bodies moving through a still fluid, since fluid velocities are forced and may be large, heat transfer via forced convection will usually be significantly larger. It should be considered as one of the main methods of useful heat transfer as significant amounts of heat energy can be transported very efficiently and this mechanism is found very commonly in everyday life, including central heating, air conditioning, steam turbines and in many other machines. Convection is also used in engineering practices to provide desired temperature changes, as in heating of homes, industrial processes, cooling of equipment, etc. Theoretical background: Convection is one of the major modes of heat transfer and mass transfer. Convective heat and mass transfer take place through individual particles in the fluid and by advection, in which matter or heat is transported by the larger-scale motion of currents in the fluid. Forced convection is typically used to increase the rate of heat exchange. Forced convection may produce results more quickly than free or also known as natural convection. Heat transfer of an object can be improved by increasing the surface area in contact with the air by adding fins or pins normal to the surface. The essential ingredients of forced convection heat transfer analysis......

Words: 945 - Pages: 4

Free Essay

Physics Formal Report - Resultant and Equilibrant Forces

...Experiment No. 2: Resultant and Equilibrant Forces ABSTRACT Using a force table, we mounted a ring to serve as the object forces act on. We attached three strings around the ring and to each end of the strings designated a pulley with corresponding weight holders situated in different directions. We proceeded to balance the weights each weight holder had to obtain equilibrium with the ring stable in the center and thereby obtaining a specific magnitude and directions for each three concurrent forces. With all three forces determined, we derived the experimental resultant forces by computing for the negative vector of any one of the three forces given the two other forces. Upon calculating the experimental resultant forces by computing for the negative vectors of the said resultant forces. Finally, we came up with the computed resultant forces of the three given concurrent forces by using the component method. QUESTIONS AND ANSWERS 1. Differentiate the Resultant and Equilibrant of two forces. A resultant force would cause a stationary object to start moving or an object with a given velocity to speed up or slow down or change directions such that velocity of the object changes. It is usually computed by the component method given two or more known forces. If a resultant force acts on an object then that object can be brought into equilibrium by applying an additional force that exactly balances this resultant. Such a force called the equilibrant force......

Words: 451 - Pages: 2

Premium Essay

Forces

...Five Forces Analysis on Competitive Forces Confronting Under Armour, Nike and Addidas Student Name University Affiliation Date Five Forces Analysis on Competitive Forces Confronting Under Armour, Nike and Addidas Under Armour, Nike and Addidas are leading manufacturer of footwear and sports accessories for children, men and women. This products are worn by athletes and persons with active lifestyles. Moreover, their products are sold in nearly all parts of the world with majority sales coming from North America. This paper Analysis five forces confronting Under Armour Nike and Addidas: superior supplier bargaining power, substitutes, new entrants, competition from existing producers and customer bargaining power. Superior supplier bargaining power is a common competitive force among the three companies. Though it is presumed that the three companies get their raw materials from several suppliers, and that supplier power is low. Suppliers form cartels and groups that help them negotiate higher prices for their supplies (Porter, 1979). Companies lack strength, to negotiate back, limiting their options and buy supplies at high prices which is common with Under Armor, Addidas and Nike. Substitutes are products that can be used in place of another product, they offer customers a wide variety of choices and can switch from one product to another with ease. This force offers a challenge among the three companies as customers......

Words: 474 - Pages: 2

Free Essay

Force Table

...GENERAL PHYSICS I EXPERIMENT NO. 5 FORCE TABLE — ADDITION AND RESOLUTION OF VECTORS INTRODUCTION Forces add together as vectors. For example, if two or more forces act at a point, a single force may act as the equivalent of the combination of forces. The resultant R of the sum of two force vectors A and B is a single force which produces the same effect as the two forces, when these pass through a common point (see figure). The equilibrant E is a force equal and opposite to the resultant. A vector may be broken up into components. To find the components of a vector in a particular coordinate system, one must find the vectors aligned with each of the perpendicular axes of the coordinate system which give the original vector when added together. METHODS FOR ADDING VECTORS PARALLELOGRAM METHOD & POLYGON METHOD To add two vectors, A + B by the parallelogram method a parallelogram is drawn of which two adjacent sides have magnitude and direction of A and B respectively. The diagonal of the parallelogram then has the same magnitude and direction as the resultant, R. Thus A + B = R. An equivalent method which may be used to add more than two vectors is to draw the vectors to be added “head to tail” (head of A to tail of B, head of B to tail of C, etc.). An arrow connecting the tail of the initial vector to the head of the final vector describes the vector sum of the vectors added. This is sometimes called the polygon method. COMPONENT METHOD To add two dimensional vectors by the...

Words: 997 - Pages: 4

Premium Essay

Intermolecular Forces

...Chang: Chemistry 7th Edition - Chapter 11 CH116 General Chemistry II INTERMOLECULAR FORCES Inter-molecular Forces Have studied INTRAmolecular forces—the forces holding atoms together to form molecules. Now turn to forces between molecules — INTERmolecular forces. Forces between molecules, between ions, or between molecules and ions. Table 13.1 Summary of Intermolecular Forces Ions Dipoles Induced Dipoles (Overhead & book p 585) Covalent bond energies 100-400 kJ/mol Attractive forces between ions 700-100 kJ/mol Intermolecular attractions less than 15% of bond energies Intermolecular Forces Ion-Ion Forces Na+ — Cl- in salt. These are the strongest forces. Lead to solids with high melting temperatures. NaCl, mp = 800 oC MgO, mp = 2800 oC Intermolecular Attractions Coulomb’s Law Force ~ (n+)(n-)/d2 Distance - twice the distance = 1/4 the force Charge on the Ion Magnitude of the dipole Composition - Solids and Liquids are closer so composition has greater role in attractive forces Attraction Between Ions and Permanent Dipoles Water is highly polar and can interact with positive ions to give hydrated ions in water. Attraction Between Ions and Permanent Dipoles Water is highly polar and can interact with positive ions to give hydrated ions in water. Dissolving Ionic Solids Attraction Between Ions and Permanent Dipoles Many metal ions are hydrated. It is the reason metal salts dissolve in water. Attraction Between Ions and......

Words: 4302 - Pages: 18

Premium Essay

5 Forces

...------------------------------------------------- 497 Study Guide Module I: Industry & Competitive Analysis “Porter’s Five Forces”: 1. What is strategy (fundamental question in strategic management) a. How to achieve superior financial performance 2. Why industry Analysis? b. Industry analysis helps a firm understand the underlying economic forces that contribute to or detract from its profitability, and subsequently suggests a means for firm to find an optimal position for itself. i. Industry is a group of firms that produce products or services that meet the same needs of customers in a competitive market. ii. Industry Analysis uses economic principles to understand how profit is distributed among participants in a market (including both direct competitors and other parties such as suppliers) 3. Porters Five Forces – are a checklist of things that can affect value capture and creation c. Rivalry Among Existing firms iii. Few firms : Betrand – fight in price Cournot – fight on quantity Collusion – Firms choose price cooperatively iv. Industry concentration: % of total industry sales accounted by the 4 largest firms d. Threat of New Entrants v. Switching cost, capital requirements, access to distribution, product differentiation vi. Puts a cap on profit potential of an industry e. Power of Buyers vii. Price Sensitivity f. Power of......

Words: 5186 - Pages: 21

Free Essay

Compostion of Forces

... EXPERIMENT NUMBER: #5 EXPERIMENT NAME: Composition of Force EQUIPMENT: Force Table, Pulleys, Thread, Slotted masses, and Hangers. OBJECTIVE: To resolve a vector in to its rectangular components and to find the sum of the three vectors using both graphical and trigonometric techniques. Also, to check the validity of the computations by experiment. THEORY: Using Graphical and trig metrical techniques we should be able to find the resultants for vectors. If the given θ we should be able to use Ax=cosθ or Ay=Asinθ to find the length of a vector. If given Ax and Ay the use A2=Ax2+Ay2 the Pythagorean thermo to find A. When adding vectors simply use Rx=Ax+Bx+Cx or Ry=Ay+By+Cy. In part A, given a force of 0.981 Newton’s at 30 degrees. Then set up this force on the force table. In part B, Given the three forces F1 = 0:490 N at 0 degrees, F2 = 0:736 N at 30 degrees, and F3 = 0:589 N at 135 degrees. Then set up these forces on the force table. In part C, Using the forces given in Part B, compute graphically the components of each of the forces. Compute the vector sum graphically by laying them out head to tail. In part D, Using the forces given in Part B, compute trigonometrically the x and y components of each force, and their sums and find the resultant F. PROCEDURE: We set up a force of .981 Newton’s at 30 degrees on the force table. We then balanced the force using a piece of string and a hanger on the end of it. We......

Words: 700 - Pages: 3

Free Essay

Use of Force

...Use of Force The use of force is inevitable in police work. In many situations the lives of officers or civilians can be taken by not using force when necessary or using it improperly. Many factors come into play when an officer decides to use force. This includes is the use of force justified, has the officer been properly trained to use force, and will the department be held liable if the force is used improperly? There are two types of force in police work. One is non deadly force and the other is deadly force. Non deadly force is force that, when used, is not likely to result in serious bodily injury or death. Now just because it is not deadly does not mean you can run around and be using non deadly force because you feel like it. To use this type of force you need to have reasonable force. Reasonable force is limited to the amount of force necessary to accomplish lawful results. Say Officers are arresting a man that is kicking and punching, those officers can use only enough force that is necessary to control the situation. If the officers were to start throwing punches back that is excessive force because now they are adding to the fire and not just trying to control the situation. One huge problem for officers is that reasonable force is subjective. This means it all depends on the situation. One thing might be reasonable force for one cop but may even be excessive force for the other due to situations and perhaps even the size of the officer. Due to the intense......

Words: 1090 - Pages: 5

Premium Essay

Force and Motion

...Force & Motion The First Law: Force and Inertia Object remains at rest will remain at rest unless acted upon by unbalanced force. Object in motion will continue at constant speed and motion unless acted upon by unbalanced force. Force is an action that can change motion. A force is what we call a push or a pull, or any action that has the ability to change an object’s motion. Forces can be used to increase the speed of an object, decrease the speed of an object, or change the direction in which an object is moving. Classification of Forces 1. Effects on motion- Balanced forces produce no motion or motion with constant velocity, while unbalanced force produce accelerated motion. 2. Line of Action- Parallel forces may go in the same direction or in opposite directions while Concurrent forces are those that meet at a point. 3. Relations to Work- Conservative forces are those that can do work and can stores energy. Non conservative are forces that can do work but cannot store energy. 4. Interaction of Bodies- Contact force when object is push by another & Distant force no contact between objects. Equilibrium 1. Stable- line passed through its center of gravity falls within the base. 2. Unstable- line dropped through the center of gravity does not fall with in the base. 3. Neutral- Does not change the center of gravity with slight tipping. Inertia is a term used to measure the ability of an object to resist a change in its state......

Words: 552 - Pages: 3

Premium Essay

Forces

...1 How are forces described ? In sciece the word push or a pull when one object pushes or pulls another object the first object exerts a force on the second object you exert a force on a computer key when you push it you exert a force on a chair when you pull it away from a table like velocity and acceleration a force is described by its strength and by the direction in which it acts pushing to the left is a different force from pushing to the right the direction and strength of the force can be represented by an arrow the arrow points in the direction of the force as shown in figure 1 length of the arrow tells you strength of the force the longer the arrow the greater the force the strength of a force is measured in the si unit called newton after sir isac newton How do forces affect newton often more than one force acts on an object at the same time the combination of all forces on an object is called net force the net force determines if and how an object accelerates you can find the net force by finding the sum of all the strengths of individual forces acting on the object look at figure 2a the big dog pushes on the box with a force of 16n to the tight the small with a force of 10 n to the right the net force on the box is the sum of these forces the box will accelerate to the right in the situation there is a non zero net force a non zero netforce causes a change in the objects motion What if the forces on an......

Words: 422 - Pages: 2

Premium Essay

Force

...Force Diatra Farasha In physics, a force is any influence that causes an object to undergo a certain change, either concerning its movement, direction, or geometrical construction. It is measured with the SI unit of newtons and represented by the symbol F. In other words, a force is that which can cause an object with mass to change its velocity (which includes to begin moving from a state of rest), i.e., to accelerate, or which can cause a flexible object to deform. Force can also be described by intuitive concepts such as a push or pull. A force has both magnitude and direction, making it a vector quantity. The original form of Newton's second law states that the net force acting upon an object is equal to the rate at which its momentum changes. This law is further given to mean that the acceleration of an object is directly proportional to the net force acting on the object, is in the direction of the net force, and is inversely proportional the mass of the object. As a formula, this is expressed as: Related concepts to force include: thrust, which increases the velocity of an object; drag, which decreases the velocity of an object; and torque which produces changes in rotational speed of an object. Forces which do not act uniformly on all parts of a body will also cause mechanical stresses, a technical term for influences which cause deformation of matter. While mechanical stress can remain embedded in a solid object, gradually deforming it, mechanical stress in a......

Words: 1107 - Pages: 5

Premium Essay

Environmental Forces

...to cost pressures from competitors because customers see the product as unique and are willing to pay extra to have the product with the desirable features. Differentiation can be achieved through real product features or through advertising that causes the customer to perceive that the product is unique.Differentiation may lead to customer brand loyalty and result in reduced price elasticity. Differentiation may also lead to higher profit margins and reduce the need to be a low-cost producer. Since customers see the product as different from competing products and they like the product features, customers are willing to pay a premium for these features. As long as the firm can increase the selling price by more than the marginal cost of adding the features, the profit margin is increased. Firms must be able to charge more for their differentiated product than it costs them to make it distinct, or else they may be better off making generic, undifferentiated products. Firms must remain sensitive to cost differences. They must carefully monitor the incremental costs of differentiating their product and make certain the difference is reflected in the price.Firms pursuing a differentiation strategy are vulnerable to different competitive threats than firms pursuing a cost-leader strategy. Customers may sacrifice features, service, or image for cost savings. Price-sensitive customers may be willing to forgo desirable features in favor of a less costly alternative. This can be seen......

Words: 16609 - Pages: 67