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# A ball of mass m with speed v strikes a wall at an angle 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 ball of mass m with speed v strikes a wall at an angle ? 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) zero (B) mv sin ? (C) mv cos ? (D) 2mv sin ? (E) 2mv cos ?
226
AP Physics Free Response Practice – Momentum and Impulse
1976B2.
A bullet of mass m and velocity vo
frictionless horizontal surface. The bullet penetrates the block and emerges with a velocity of
is fired toward a block of mass 4m. The block is initially at rest on a
3
vo
(a) Determine the final speed of the block.
(b) Determine the loss in kinetic energy of the bullet.
(c) Determine the gain in the kinetic energy of the block.

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