Assuming the earth to be a sphere of uniform mass density, how much would a body weigh half way down to the centre of the earth if it weighd 250 N on the surface ?

Explanation

To solve the problem of how much a body would weigh halfway down to the center of the Earth if it weighs 250 N on the surface, we can follow these steps:

### Step 1: Understand the relationship between weight, mass, and gravity
The weight of an object (W) is given by the formula:
\[ W = m \cdot g \]
where:
- \( W \) is the weight,
- \( m \) is the mass of the object,
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