Question

show that during the free fall the total energy remains constant ? ​

Answer 1

Explanation:

bcz during free fall there is no external for ce acting on the body .

potential energy + kinetic energy =mechanical energy

i.e

mgh +½ mv² =constant

if potential energy decrease then kinetic energy increases and vice versa.

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Answer 2

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Let a body of mass 'm' placed at a height 'h' above the ground, start falling down from rest. In this case we have to show that the total energy (potential energy + kinetic energy) of the body at A, B and C remains constant i.e, potential energy is completely transformed into kinetic energy.