Q. 10. An object of mass is raised to a height of above the ground. What is its potential energy? If the object is allowed to fall, find its kinetic energy when it is half-way down.
The potential energy of an object of mass m and at the height at h is given as = mgh
The potential energy of the given object is :
The potential energy is being converted into the K.E..
Thus at half-way kinetic energy of the object is :