Question

a child is sliding down a slide at the playground. is the mechanical entertainment conserved? why or why not?

Answer 1

the answer is b
id say its lost because you have to push yourself to start moving down the slide, so theres some lost to friction
hope you pass with a 100 A
hope this is right and helps

Answer 2

Answer: No. Some energy is lost due to friction.

Explanation:

Practically, when a child is sliding at the playground, the potential energy at the top of the slide  converts to kinetic energy at the bottom but not completely. On the way down, due to friction between the child and the slide surface, some energy is lost. Thus, mechanical energy which is sum of potential energy and kinetic energy is not conserved in the given situation.