1. The problem statement, all variables and given/known data 1) A 0.1 kg ball is rolling across the floor at 0.5 m/s when it hits a wall and reverses direction without any change in speed. A) Can you determine the impulse delivered to the ball by the wall? If so, what is it? If not, explain why not. B) Can you determine the impulse delivered by the ball to the wall? If so, what is it? If not, explain why not. C) Can you determine the force exerted by the wall on the ball? If so, what is it? If not, explain why not. 2. Relevant equations Jnet = [tex]\Delta[/tex]p p = m*v J = Fnet * [tex]\Delta[/tex]t 3. The attempt at a solution My problem - I managed to calculate that the change in momentum for the ball is -0.1 m/s, but if this is the amount of impulse it exerts on the wall (since Jnet = Δp), wouldn't the wall exert an equal and opposite impulse? But wouldn't the wall's momentum and therefore change in momentum be zero, because Δp = m * Δv, and the wall never has any velocity.