Physics

Problem

42. A ball of mass m with speed v strikes a wall at an angle

\theta

with the normal, as shown. It then rebounds with the same speed and at the same angle. The impulse delivered by the ball to the wall is (A)

m v \sin \theta

(B)

m v \cos \theta

(C)

2 m v \sin \theta

(D)

2 m v \cos \theta

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