A body weighs 63 N on the surface of the earth. What is the gravitational force on it due to the earth at a height equal to half the radius of the earth ?

Explanation

To solve the problem, we need to determine the gravitational force acting on a body at a height equal to half the radius of the Earth. Here are the steps to find the solution:

### Step 1: Understand the Weight of the Body on the Surface
The weight of the body on the surface of the Earth is given as 63 N. The weight (W) can be expressed using the formula:
\[ W = \frac{G \cdot M \cdot m}{R^2} \]
where:
- \( G \) is the gravitational constant,
- \( M \) is the mass of the Earth,
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