A block, initially in thermal equilibrium with its surroundings, slides down an

Question

A block, initially in thermal equilibrium with its surroundings, slides down an incline. A student was able to measure the speed and height of the block at the start and finish of its journey down the ramp. The bar chart below is their attempt to create an energy bar chart for this situation. The student claim is that the chart is for a system which includes the block and the earth 1. If necessary fix their bar chart so that it is correct for the block and earth system. Explain your reasoning for any changes made. 2. Give a basic description of what is happening beyond the statement of the problem. (i.e. describe in words the motion of the block, forces acting relevant to the information on the bar chart, transfers (into or out of the system), and any transformations of energy (from one form to another) within the system. KE, U KE, U

Explanation / Answer

Tha above bar represents the energy of block and earth at the beginning of its slides down the ramp and when it reaches the bottom of the ramp.

In the first state, as the block has less KE and large pE due to its position/height. As it slides down, the PE start converting to KE as it loses height and gains velocity. The gain in velocity is due to gravitational forces acting on the block. And finally, when it reaches the ground, its entire PE is converted to KE.

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