Question

Prove that the kinetic energy of a
freely falling object on reaching
the ground is nothing but the
transformation of its initial potential
energy​

Answer 1

Explanation:

In other words, kinetic energy with which it hits the ground is the transformation of its initial potential energy. Answer: When a free falling object touches ground...its kinectic energy gets converted into heat (produced due to friction) and sound energy. ... And energy remains conserved.

Answer 2

Answer:

Total energy at initial position = K.E + P.E = 0 + mgh

Total energy when it reaches the ground = K.E + P.E = 0.5mv^2 + 0

Velocity when it reaches the ground = sqrt(2gh)

Substitute velocity in total energy equation

Total energy when it reaches the ground = 0.5mv^2 = 0.5m * 2gh = mgh

We found that total energy when it reaches the ground = Total energy at initial position.

In other words, kinetic energy with which it hits the ground is the transformation of its initial potential energy.