1. A 0.45 ACP bullet is fired at a piece of wood, and goes completely through the wood, coming out the other side. If the bullet has a mass of 15 gms (0.015 kg), a velocity of 278 m/s before impact, 162 m/s after penetrating the board, and the board is 18.9 mm thick (0.0189 m), what force does the bullet produce on the board? Assume the deceleration through the board is uniform (this is not a very good assumption in real life, but not a terrible one.) Hint: calculate the acceleration of the bullet as it goes through the wood, and then use Newton's second law to calculate the force on the bullet, and Newton's third law to determine the force on the board