Question

Several rocks slide down a mountainside, each with the same velocity. Which rock will have the greatest momentum?

A. The biggest rock.
B. The smallest rock
C. The rock in front
D. The rock in the rear

Answer 1

The biggest rock, because it has more mass. More mass means that gravity is stronger on it than the other rocks, thus pulling it towards the center of the Earth more quickly, when on a slope.

Answer 2

The biggest rock because it has more mass contained and pushes more force against gravity