A bullet is fired through a wooden board with a thickness of 8.0 cm. The bullet hits the board perpendicular to it, and with a speed of +350 m/s. The bullet then emerges on the other side of the board with a speed of +210 m/s. Assuming constant acceleration (rather, deceleration!) of the bullet while inside the wooden board, calculate the acceleration.
1 answer
-10412.5 m/s^2 I think