The force of gravity on a bowling ball rolling along a horizontal surface doesn't change its speed because the force is
A)small compared to the ball's weight.
B)canceled by the normal force.
C)perpendicular to its direction of motion.
D)canceled by friction.

Question

Quizplus · Accepted Answer

The force of gravity acts vertically downward, while the motion of the bowling ball is horizontal. Since these directions are perpendicular to each other, gravity does not change the speed of the ball.

The Force of Gravity on a Bowling Ball Rolling Along