Question

A Ball Hits a Wall Elastically Part A A ball of mass m moving with velocity strikes a vertical wall as shown in (Figure 1). The angle between the ball's initial velocity vector and the wall is 0, as shown on the diagram, which depicts the situation as seen from above. The duration of the collision between the ball and the wall is Δ, and this collision is completely elastic. Friction is negligible, so the ball does not start spinning In this idealized collision, the force exerted on the ball by the wall is parallel to the x axis. what is the final angle θ, that the ball's velocity vector makes with the negative y axis? Express your answer in terms of quantities given in the problem introduction. Hints Submit My Answers Give Up Part B Figure 1 1 of 1 This question will be shown after you complete previous question(s) Continue

Answer 1

Solution-

a) Because the collisoin is perfectly elastic Vi =Vf

mVicosθi =mVfcosθf

therefore θf =θi