If a planet of given density were made larger, its force of attraction for an object on its surface would increase because of the greater distance from the object to the centre of the planet. Which effect predominates?

Explanation

To solve the question, we need to analyze the effects of increasing the size of a planet with a given density on the gravitational force experienced by an object on its surface. We will consider the gravitational force formula and how mass and distance from the center of the planet play a role.

### Step-by-Step Solution:

1. **Understanding Gravitational Force**:
The gravitational force \( F \) between two masses is given by Newton's law of gravitation:
\[
F = \frac{G \cdot m_1 \cdot m_2}{r^2}
...