A couple of physics questions for yous
1. A 0.001kg bullet 1000m/s strikes and passes through a 2kg block initially at rest. The bullet emerges from the block with a speed of 400m/s. To what maximum height will the block rise above its initial position?
2. High-speed stroboscopic photographs show that the head of a golf club of mass 0.23kg is travelling at 54.3m/s just before it strikes a 0.045kg golf ball at rest on a tee. After the collision, the club head travels (in the same direction) at 41.1m/s. Find the speed of the golf ball just after impact.
3. A railroad car of mass 2.17 x 10^4 kg is moving with a speed of 4.4m/s. It collides with four other coupled railroad cars, each of the same mass as the single car and moving in the same direction with an intial speed of 2m/s.
a) What is the speed of the five cars after the collision?
b) How much energy is lost in the collision?