The force of the racket affects the ball's motion because it changes the momentum of the ball.
The impulse received by the ball through the racket affects the motion because it changes the momentum of the ball.
The ball which is initially at rest, will gain momentum after been hit with the racket.
J = ΔP = Ft
where;
Thus, the force of the racket affects the ball's motion because it changes the momentum of the ball.
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