Answer: If the boy pushing on the ball is the action force, then the reaction force is friction.
The boy on the skateboard will move the opposite direction that the skateboard is moving.
The reaction force is friction if the action force is the boy pushing on the ball.
The boy's skateboard moves in the opposite direction as compared to the direction of action force.
As per the newton's third law, every action has a reaction that is equivalent and opposite in direction to its action.
So if the boy pushing the ball in forward direction, the result is the friction that takes place between the boy's skateboard and the surface.
Due to the friction generated between the boy's skateboard and the surface, the skateboard moves in backward direction.
For more details, follow the link given below.
https://brainly.com/question/13925445.
