Consider a planet moving in an elliptical orbit round the sun. The work done on the planet by the gravitational force of the sun

Explanation

To solve the problem of the work done on a planet moving in an elliptical orbit around the Sun by the gravitational force, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Motion**:
- The planet is moving in an elliptical orbit around the Sun. The points in the orbit where the planet is closest and farthest from the Sun are called perihelion and aphelion, respectively.

2. **Identifying Forces**:
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