Question

1. A spaceship with mass 1000kg is floating at rest in space. It ejects 30kg of gas at 20m/s. What is the resulting speed of the spaceship?

2. A 136 kg defensive lineman is about to tackle a 100 kg quarterback. Right before impact, the lineman is moving at 6.0 m/s (positive direction) and the the quarterback is moving at 1.0 m/s in the opposite direction (negative direction). Determine the speed and direction of the two players immediately after the tackle. (Inelastic collision).

3. A 35 Kg boy falls (from rest) into a moving trolley of mass 70 Kg (inelastic collision) and already moving at a velocity of 5 m/s to the right. What is the speed of the trolley after the boy has jumped in ?

4. A 5 Kg gun fires a bullet of 0.015 grams at a velocity of 1000 m/s to the right. What is the velocity of recoil of the gun?

5. Two balls are traveling toward each other with velocities of -1.1 m/s (Ball A) and +6.5 m/s (Ball B) and they experience an elastic head-on collision. Ball A has a resulting velocity of -0.1 m/s. If the mass of the Ball A is 3 times that of Ball B, what is the resulting velocity of Ball B?

Answer 1