Question

In order that the force of attraction between two bodies may become noticeable and cause motion, one of the bodies must have

• A. An extremely large size
• B. An extremely large mass
• C. An extremely large density
• D. None of the above

Answer 1

The correct option is B

An extremely large mass

Force due to Gravity

1. It is a force of attraction between all objects.
2. There are just two factors that matter when dealing with the gravitational force between two objects: mass and distance.
3. The gravitational force is proportional to the product of masses of the two objects and inversely proportional to the square of the distance between them.
4. $\text{Gravitational force ,}{F}_g=\frac{GMm}{R^2}$; M and m are masses of objects and R is the distance between them.

Therefore the right answer is an option (b) an extremely large mass.