Further discussion (these answers are to be typed and attached after these quest

Question

Further discussion (these answers are to be typed and attached after these questions in your report) 1. A student finds that the change in Kinetic Energy of the cart and spring is close to being the same value as the amount of work done by the spring using the integral feature, but was always consistently low. What could be the possible reasons for this? 2. You are in a Firehouse and decide to walk up a spiral staircase to the second floor located 3 meters above the first floor. You then walk across the floor to the fire pole which is 2 meters away from the spiral staircase. You slide down the fire pole to the first floor. You then walk back over to the spiral staircase where you started. Determine the change in Gravitational Potential Energy that you experience as you: (a) Walk up the spiral staircase (b) Walk across the second story floor to the fire pole (c) Slide down the fire pole (d) Walk across the first story floor to the spiral staircase (e) What is the total change in Gravitational Potential Energy for the entire trip? Use your mass to determine these changes (2.2 pounds = 1 kilogram). Show work. 3. Determine the change in Kinetic Energy of an object that is subjected to a force as shown in the following graph: 4. A ball having a mass of 2 kilograms, starting at ground level, is shot straight up into the air. It reaches a height of 10 meters and falls back down to the ground. What is the ball

Explanation / Answer

a. the air resistance and other forces reduce the kinetic energy of the cart, hence the work done by the spring against cart. b. the net change in gravitational potential energy = 0. let m= 60 kg mgh = 60 X 9.8 X 3= 1764. going to firepole , =0 comimg down = -1764 bac to start =0 net=0 c. th kinetic energy when shot= 1/2 mv^2 when it is at its highest point = 0 when it hits ground = 1/2 mv62 total energy is constant through out the journey

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