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An indestructible bullet 2.00 cm long is fired straight through aboard that is 10.0 cm thick. The bullet strikes the board with aspeed of 430 m/s and emerges with aspeed of 290 m/s. (To simplify, assumethat the bullet accelerates only while the front tip is in contactwith the wood.)
(a) What is the average acceleration of thebullet through the board?
m/s2
(b) What is the total time that the bullet is in contact with the board?
s
(c) What thickness of board (calculated to 0.1 cm) would it take tostop the bullet, assuming that the acceleration through all boardsis the same?
cm
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