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

Friction and drag oppose the motion of the ball.
There is no force acting to move the ball forward.
The force of friction against the ball is decreased.
The forces opposing the ball are unbalanced.
The force of gravity has increased and stopped the ball.
There was too much inertia to keep the ball rolling.

Answer 1

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

1. Friction and drag oppose the motion of the ball. - Friction between the ball and the grass, as well as air drag, both work against the motion of the ball, slowing it down.

2. The forces opposing the ball are unbalanced. - As the ball rolls, the forces acting on it (gravity pulling it down, friction and drag opposing it) are unbalanced, leading to a net force that slows it down.

3. There is no force acting to move the ball forward. - Once the ball stops rolling down the hill, there are no additional forces pushing it forward, which contributes to it eventually coming to a stop.

The other options do not accurately explain why the ball comes to a stop.