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Momentum

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**What is the equation the links momentum with mass and velocity**

What is the equation the links momentum with mass and velocity? …………………………………………………………………..(1mark) A car of mass 1000kg is travelling at 15m/s, what is its momentum? ……………………………………………………………………(1 mark) A car of mass 1000kg has a momentum of 13000kgm/s, what is its speed? ……………………………………………………………………(1 mark) A car travelling at 11.5m/s has a momentum of 12000kgm/s, what is its mass? ……………………………………………………………………(1 mark) A 0.5kg trolley A is pushed at a velocity of 1.2m/s into a stationary trolley B of mass 1.5kg. The two trolleys stick to each other after the impact. What is the momentum of trolley A before the collision. What is the velocity of the two trolleys after the collision? ……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………(3 marks) A car is travelling at 10m/s, it hits and stays in contact with another car of the same mass. What is the resultant speed of the two cars together? ……………………………………………………………………………………………………………………………………………………………………………………………………………………………………(2 marks) A car of mass 950kg is travelling at 20m/s when it shunts another car of mass 1000kg which is travelling at 15m/s. What is the momentum of each car before the collision and what is the velocity of the two cars together after the collision? …………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………… (3 marks) Trolley A of mass 2kg is travelling at 0.3m/s. Trolley B of mass 2.5kg is travelling in the opposite direction at 0.2m/s. The two trolleys collide and stick together. At what velocity do the trolleys travel after the collision? …………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………… (3 marks)

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**8) What equation links change in momentum, time and force**

8) What equation links change in momentum, time and force? ………………………………………………………………… (1 mark) 9) A bullet of mass 0.004kg moving at a speed of 90m/s is stopped by a little bullet-proof vest in s. Calculate the impact force. ………………………………………………………………………… (1 mark) 10) At turn 8 of the Spanish grand prix Heikki Kovalainen went off the track at 150miles per hour (67m/s). The car hit the tyre wall and came to a stop in 0.008s. A F1 car has a mass of 604kg. Calculate the force on the car. ………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………...(2 marks) 11) A car of mass 900kg is travelling at 13m/s when it hits another car of mass 750kg. Both cars then collide into a wall and come to a stop with an acceleration of -0.5m/s2. How long did it take the cars to com to a complete stop and what was the force on the cars during this time? ……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………… ………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………...(4 marks)

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