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In the first procedure in which we observed the work done and the power needed of the fan cart with deed weight by measuring the time in its specific distance. We arrived at a conclusion that the tarter the distance covered by the tan cart the slower the time elapsed and the higher amount of work and power is consumed, the power. In the second procedure in which we measured the motion tot a curved path we measured it’s angle, distance covered and its height by having a varying force applied into It using the spring balance to record the force applied in Newton. 2] We have observed that the bigger the force applied; there is also increase in height, an increase in its distance covered and with that the work done ND its potential energy also increases. [3] We now proved that the theory on conservation of favor-energy is therefore true. Key Words – Conservation Principle, Work-Energy, Potential Energy 2. INTRODUCTION [I] Work is said to be done when a force causes a displacement in its own direction.

Mathematically, work is given by the product of the force and the distance through which the force acts. Work done by an agent exerting a constant force (F) and causing a displacement (s) equals the magnitude of the displacement s, times the component of F along the direction of W scope Figure 1: The illustration of the formula W=scoop Note: (2, l). If W = O. (ii: no work is done when holding a heavy box, or pushing against a wall) (2. 2).. W 0 it FISH (ii: no work is done beggaring bucket Atwater horizontally), (2. 3).

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The sign of W depends on the direction of P relative to 5: W ; O when component of F along s is in the same direction as s, and W; O when it is in the opposite direction This sign is given automatically if we write e as the angle between F and s and write W = Fosse. (2. 4). If F acts along the direction of s then W = since cosec = coos O = I. (2. 51 Work is a scalar. (2. 6). The SSL units fork are Joules (J) (1 Joule= 1 Newton meter). In CSS units: I erg = I dyne [2] Power is the time rate Of doing work or, the amount of work done per second.

Power is also defined as the rate of doing work. Average Power: ;Power is a scalar. ;IS Units: 1 Joule,’sec- Gig AMA/SAA ;British Engineering units: 1 horsepower (HP) 3. Methodology = 746 watts (3, 1). In Part 1. Determining the Force, Work. And Power of the Fan Cart. 1,) After all the Equipment are completely set-up, we place the tan cart on a leveled track make sure it is O degrees with the surface) then attached a string to the fan cart at one end at the other end is a pan. . Then turn the fan cart on and observe in which direction does it move and adjust the orientation of the cart blades so the fan would move away from the pan. 3. ) After that while the fan is working we put some weight on the hanging pan until the force is balance between the force exerted by the fan cart and the hanging weight until the fan cart doesn’t move, then we record the force of the fan cart that is with the use of the formula “F=MGM”. J after recording the force we place the fan cart at one end of the track and determine how long would it take to cover a certain distance using the Photostats or a timer. We then perform four trials with varying distance (the pan here is no longer attached to the fan cart) 5. ) In each case we solved for the work, and average power of the pan cart using the equation; Seen. 2 W=Fosse and Seen. 5 Pave-workmate (3. 2). In Part 2. Work by a Force on a Curved Path 1 J We set up all the equipment and then, we attach a mass at the end of a string tied to an iron stand.

Record the initial height ho. 2. ) then we slowly pull the mass by applying horizontal force on the mass using the spring balance then we measured the final height HP of the mass and record the horizontal force F as read by the spring balance. . ) After that we have perform 4 trials with increasing height for each consecutive trials and in each trial we compute for the work done by the force F using the equation -COOS) Where: W – work in moving the mass through arc S, = weight of mass in Newton, L -?length of the string in meters, angle of the string with vertical degrees. ) Then we computed tort the increase in the gravitational potential energy of the mass for each consecutive trial using PEE= MGM The study of Work, Energy and Power is one of the most essential part in the world of Physics, it deals with the motion of an object and how Work affect the Force applied and Displacement of an object with the help of Newton’s Law of motion, Newton’s laws serve as a useful model for analyzing motion and making predictions about the final state of an object’s motion because in Newton’s law of motion Vortex and mass information were used to determine the acceleration of an object.

Acceleration information was subsequently used to determine information about the velocity or displacement Of an Object after a given period of time. The study of Work, Energy and Power is an entirely different model that Will be used to analyze the motion Of Objects. Motion Will be approached from he perspective of work and energy. The effect that work has upon the energy of an object (or system of objects) will be investigated; the resulting velocity and/or height of the object can then be predicted from energy information.

In order to understand this work-energy approach to the analysis of motion, it is important to first understand the basic terms of Work, Energy and Power including the meaning of Work which is the ability to do work and types of energy including Mechanical energy, Potential energy, and kinetic energy, And as well as the meaning tot power. That is the rate at which work is done. In this Experiment 102 titled “Work, Energy and power” we have tackled problems The word work has a variety of meanings. It means different things to different people.

To some, mere application of force is already considered as work, But in physics, work is done only when a force is applied to a body and moves it. There are several good examples of work which can be observed in everyday life – a horse pulling a plow through the field, a father pushing a grocery cart down the aisle Off grocery store, a freshman lifting a backpack full of books upon her shoulder, a weightlifter lifting a barbell above his head, an Olympian launching he shot-put, etc. In each case described here there is a force exerted upon an object to cause that object to be displaced.

The quantity Which has to do With the rate at Which a certain amount Of work is done is known as the power. Power is the rate at which work is done. It is the work/time ratio. The standard metric unit of power is the Watt (J/s). Another unit of work usually associated with power rating of machines is troposphere. Most machines are designed and built to do work on objects. All machines are typically described by a power rating. The power rating indicates the rate t which that machine can do work upon other objects. Thus, the power of a machine is the work/time ratio for that particular machine.

A car engine is an example of a machine which is given a power rating. The power rating relates to how rapidly the car accelerate the car, Suppose that a 40-horsepower engine could accelerate the car trot 0 mi/hrs to 60 miter in 16 seconds. If this were the case, then a car with four times the horsepower could do the same amount of work in one-fourth the time. That is, a 160-horsepower engine could accelerate the same car from O mi/hrs to 60 mi/hrs in 4 seconds. The point is that for the same mount of work, power and time are inversely proportional.

The power equation suggests that a more powerful engine can do the same amount of work in less time. A person is also a machine which has a power rating. Some people are more power-full than others, That is, some people are capable of doing the same amount of work in less time or more work in the same amount of time. Analysis of Data In the first part Of the experiment, we use a fan cart and first thing we do it to get the force of the fan cart by tying a string in the fan cart and hang a mass until the system is not moving that means that it is in equilibrium State.

The tension in the string is equal so that the hanging mass multiplied by the gravitational pull of the earth Which is 9. 8 ms is equal to the force exerted by the fan cart. Then eve remove the string and turn on the fan cart and then let it move and record the time when it passes the certain distance in the track. We can say that the time that’s being recorded for the four trials is directly proportional to the distance or displacement that being covered by the cart, as the displacement increases the time also increases, and we can also say that the velocity is constant because the fan cart gives off a constant force.

The result that we got for work in the four trials is increasing from the first trial to the last trial because we increases the distance it covers and the work is the product of the force and the distance covered by the object, And the power is the rate at which the work is done it is the work done per unit of time which is second. We got the values of power by dividing the work by the time we got in the smart timer reading. And in table 2, we measure the length of the string and the initial height which is the distance of the mass in the table which serve as our reference line.

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