Impact forces

Question 1

What is the equation for the force of an impact?

Answer 1

change of momentum / contact time

mv / t

Question 2

What is the equation for the force of a rebound?

Answer 2

change in momentum = final momentum - initial momentum

( -(mv) - mu ) / 2

Question 3

What happens in the impact is oblique?

Answer 3

( not perpendicular to the wall)

u cos theta - u cos theta

momentum of the ball = -2 mu cos teta