Progress Assessment 1 2012 KEY

# Looking for given relationship solution momentum m200

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• apiccirello
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Looking For Given Relationship Solution Momentum m=200 kg v=15 m/s P=mv = 200 x 15 P = 3000 kg m/s 22. Calculate the mass of a car traveling at 10 m/s that has a momentum of 4,000 kg m/s. Looking For Given Relationship Solution 5 | P a g e

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Mass p=4000 kg m/s v=10 m/s m=p/v = 4000/10 400 kg 23. What are the units of momentum? Impulse? Momentum = Kg m/s Impulse N·s 24. What is the formula for impulse? J = F*t 25. What is the difference between an elastic and an inelastic collision? Elastic collisions are where two objects collide and bounce off each other. Inelastic collisions are where two objects stick together after the collision. 26. Explain the physics behind padded dashboards. Padded dashboards increases contact time thus decrease force. 27. A 500-kg car moves at 5 m/s in 2 seconds. Determine the momentum of the car? Looking For Given Relationship Solution Momentum m=500 kg v=5 m/s P=mv 2500 kg m/s Calculate the impulse necessary to stop the car. Looking For Given Relationship Solution Impulse m=500 kg v=5 m/s Mv=Ft 2500 kg m/s Calculate the force acting upon the car as it comes to a stop. Looking For Given Relationship Solution Force m=500 kg v=5 m/s t=2 s Mv = Ft 1250 N 6 | P a g e
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