Momentum Review Questions

# After the bullet travels through the block the block

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The bullet goes through the wooden block and comes out the other side at 200m/s. After the bullet travels through the block, the block moves 0.lm before skidding to a stop. What is the mass of the bullet? 0.0092kg 4) A 1,200kg car is moving at 40m/s when the driver notices a cliff 100m ahead. The driver takes 0.4s to react and hit the brakes. The car skids with a coefficient of kinetic friction of 0.32 but unfortunately does not stop in time. Luckily there is 500kg concrete barrier to stop the car. The car crashes inelastically into the barrier and bounces back at 1.5m/s. If the cliff is 30m high, where will the concrete barrier land? 203.03m 1) A 1,500kg car travels on a horizontal surface at 40m/s when the driver slams on the brakes and skids. After the skid, the car is traveling at 25m/s. The coefficient of friction between the car’s tires and the road is 0.9. How long were the brakes applied? 1.7s 2) A 50kg blocks starts from rest at the top of a frictionless incline. The angle of the incline is 22º and the incline is 10 meters long. At the bottom of the ramp is a horizontal surface. Sitting immediately at the bottom of the incline on the horizontal surface is a 20kg block. The 50kg block has a perfectly inelastic collision with the 20kg block.
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