**If g is the acceleration due to gravity at the Earth’s surface, the gain of the potential energy of an object of … (b) mgR/2 (c)…**

###### Answers:

**Correct option MgR/2**

** Explanation:**

**Let the potential energy of an object at earth’s surface be U _{1}**

_{}

**where,**

** M = mass of earth **

** m = mass of object **

** R = radius of earth**

**Potential energy of the object at a height, h = R from the surface of the Earth.**