Analysis of Work, Energy and Power Experiment Essays

Analysis of Work, Energy and Power Experiment Essays Analysis of Work, Energy and Power Experiment Essay Analysis of Work, Energy and Power Experiment Essay 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 30Â °, second trial we use 60Â °, third trial 45Â ° and the fourth trial we use 90Â °. 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-cos? and for the gravitational potential energy we use the formula PEg=mg(hf-h0). We must derive the same result with the work done and the gravitational potential energy or close to that because L 1-cos? s equals to hf-h0. There are hundredths discrepancies on the result maybe because of our measurement in the height but we can say that it is also close to each other. Conclusion In this experiment I learn that the greater the displacement the greater the work done with a constant force acting on the system. And also I learn that the work done is equal to the gravitational potential energy. Work, power and energy vary directly to the displa cement or change in height. There is no work done, power and energy when there is no displacement occurs in the system. Energy is just changing from one form to another and it is neither be destroyed nor created. It is the ability of an object to do work and the rate of work with respect to time is called power. And work is just the product of the force and the displacement. The can be positive, negative and even zero depending on the angles between the force acting on it and the displacement done by the object. The gravitational potential energy is the energy stored within an object due to its height above the surface of the earth. To lift a certain object upward, the work must be done against the downward pull of the earth. And it also varies directly to the weight of an object that being lifted, the heavier the object is the higher work or energy is needed to lift it upward. One of the best examples of work, energy and power is when you are walking at a certain displacement, even you are just walking you’re already doing work the force is your weight and multiplied it to the displacement you covered from walking you already compute the work you’ve done and the power is basically the work over the time you covered from walking, the power is the rate of the work you’ve done and the energy is capacity for doing that work which is walking.