Analysis of Work, Energy and Power Experiment
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 ms2 is equal to the force exerted by the fan cart. Then we 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. And the using the spring balance we lift the mass in different angles, in trial 1 we use 30°, second trial we use 60°, third trial 45° and the fourth trial we use 90°. As we lift the mass we measure the distance of the mass from our reference line and the horizontal distance of it from its original position and also we record the reading of the force in the spring balance. From those values we compute for the work and the gravitational potential energy of that table. For the work done we use the formula w=mg L 1-cosθ and