Q1. A 9300 kg boxcar travelling at 23 m/s strikes a second boxcar at rest. The two stick together and move off with a speed of 15 m/s. What is the mass of the second car?
Q2. A bullet is fired horizontally with an initial velocity of 743 m/s at a target located 165 m from the rifle.
How much time is required for the bullet to reach the target?