Question

if the skier has 100 joules (j) of energy at the top of the hill, approximately how much does he have at the bottom of the hill? 1j 10j 100j

Explanation:

Step1: Consider energy conservation and loss

Energy is conserved in an ideal situation. But in reality, there is friction (e.g., between skis and snow, air resistance). A significant amount of energy is lost as heat due to these non - conservative forces.

Step2: Analyze the options

If there was no energy loss (ideal case), energy would be 100 J. But since there is loss, 100 J is incorrect. 1 J is too low as the skier is still moving (has kinetic energy). 10 J is a more reasonable approximation considering some energy is lost but not all.

Answer:

10 J