A ball rolls down a grassy hill and eventually comes to a stop. Select three of the reasons the ball comes to a stop.

Question

A.
Friction and drag oppose the motion of the ball.

B.
There is no force acting to move the ball forward.

C.
The force of friction against the ball is decreased.

D.
The forces opposing the ball are unbalanced.

E.
The force of gravity has increased and stopped the ball.

F.
There was too much inertia to keep the ball rolling.

Answer 1

The three correct reasons the ball comes to a stop are:

A. Friction and drag oppose the motion of the ball.

B. There is no force acting to move the ball forward.

D. The forces opposing the ball are unbalanced.

These statements correctly describe why the ball eventually stops: friction and drag act against its motion, there is no longer a driving force propelling it forward, and the forces of friction (opposing) exceed any forces acting to keep it moving (like gravity or momentum).