Q1. A 60 Kg boulder falls from the edge of a cliff, reaching a speed of 14 metres per second. Calculate the boulder's momentum.


Q2. A 12g bullet is shot from a rifle, and has a momentum of 10.728 Kg m/s. What is its muzzle velocity, in miles per hour?


Q3. A car with a mass of 1000 kg is travelling at a velocity of 20 m/s when it collides with a stationary car of the same mass. After the impact both vehicles move off together, calculate their velocity.


Q4. A lorry of mass 12,000 kg travelling along at a velocity of 15 m/s, crashes into the back of a moving car with a mass of 1500 kg, travelling at a velocity of 5 m/s. Upon collision, the vehicles remain in contact. Calculate their forward velocity.


Q5. A rifle with a mass 3 kg fires a bullet with a mass of 100 g at a velocity of 250 m/s. What is the recoil velocity of the gun? 


Q6. A standard bowling ball, of mass 5 Kg is bowled along a tenpin bowling run/track. Assuming no energy losses due to friction, air resistance etc, what will its Kinetic Energy be, in Joules, when it strikes the centre pin with a momentum of 15 Kg m/s ??


Q7. A cannon fires a cannonball with a mass of 10 kg at a velocity of 100 m/s, this causes the cannon to recoil at 2 m/s. What is the mass of the cannon?


Q8. An astronaut, during an EVA session (extravehicular activity, otherwise known as a "spacewalk") with a mass of 125 Kg throws a 15Kg used equipment pack forwards, in front of him at a velocity of 2.5 m/s. In which direction will the astronaut travel and at what velocity?


Q9. Two rugby players, Player A and Player B are charging towards each other. They have masses of 108 Kg and 89 Kg respectively. Player A is running towards Player B at 5 m/s and Player B is running towards Player A at 6 m/s. They collide with each other. What will their velocity be after the collision, and in which direction?


Q10. Two steel balls approaching from opposite directions collide and move off together to the left at 1.5 m/s. The first ball (moving to the right) has a mass of 5.6Kg and was moving at 1.3 m/s. The second ball has a mass of 7 Kg. What was the approach velocity of the second ball before the collision?


Q11. This is a two-part question. A  snooker player strikes the cue ball with the intention of potting the green ball for 3 points. However, the shot misses and the green ball collides with a stationary blue snooker ball. Both green and blue balls have a mass of 160 g. Before the collision, the green ball was moving to the right at 0.5 m/s.


(a) calculate the total momentum of the two ball system before the collision.

(b) after the collision, the green ball continues to move to the right at 0.1 m/s, what is the velocity of the blue ball after the collision?


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