Question

These four trucks are identical. Each box loaded on the trucks has the same mass. Choose the truck that has the greatest force of gravity acting on it.

Answer 1

So basically the gravitational force is dependent on the mass and the distance between 2 objects(invalid here).

So mass of the loaded trucks is the key point.

Here as the trucks are identical,

Thus the truck with the most number of boxes will have the greatest force of gravity acting on it.