Assuming that the gravitational potential energy of an object at infinity is zero, the change in potential energy (final-initial) of an object of mass m, when taken to a height h from the surface of earth (of radius R), is given by,

Question

Question

Answer 1

CONCEPT:

The potential energy is written as;

Here we have M is the mass of earth, m is the mass of an object, r_f

is the final radius, ri is the initial radius and G is the gravitational constant.

CALCULATION:

At initial the object will have a radius of R

In the final, the object will have a radius of R+h

Now the potential energy is written as;

Hence, option 4) is the correct answer.

Download Solution PDF