An indestructible bullet 2.00 cm long is fired straightthrough a board that is 10.0 cm thick. The bullet strikes the boardwith a speed of 470 m/s and emergeswith a speed of 250 m/s. (To simplify,assume that the bullet accelerates only while the front tip is incontact with 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 theboard?
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