Question

3 fiona rolled a skateboard down the sidewalk. after a few seconds, the skateboard slowed down and stopped. what force caused the skateboard to stop?

Explanation:

Friction is a force that opposes the motion of objects. When the skateboard rolls on the sidewalk, there is friction between the wheels of the skateboard and the surface of the sidewalk. This frictional force acts in the opposite direction to the motion of the skateboard, gradually reducing its speed until it stops.

Answer:

Friction.