Question

A bag of wheat is dropped from a height h. What energy conversion takes place as it reaches  the ground?

Answer 1

When the object is at some height from the surface of the earth then the energy in that body is equal to the potential energy=MGH

potential energy=MGH

this potential energy converts into kinetic energy when body reaches ground.

So all the potential energy is converted to kinetic energy when the body reaches the ground

So: MGH = 1/2×M×V^2

however the total mechanical energy of the system is always cancelled because gravitational force is a conservative force.

Hope it helps you!

Answer 2

At height h it has potential energy i.e. mgh. But as it is dropped initialy it was at rest so its intial velocity is 0 so its kinetic energy is also 0

But ground its potential energy is 0 because height from ground is 0. But as it hits the ground with some velocity v so it has some kinetic energy (mv²)/2.

So whole potential enery is converted into kinetic energy