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Chapter 11: Q. 20 (page 287)
A car is rolling at . You would like to stop the car by firing a blob of sticky clay at it. How fast should you fire the clay?
The speed of the clay should be
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A 2100 kg truck is traveling east through an intersection at 2.0 m/s when it is hit simultaneously from the side and the rear. (Some people have all the luck!) One car is a 1200 kg compact traveling north at 5.0 m/s. The other is a 1500 kg midsize traveling east at 10 m/s. The three vehicles become entangled and slide as one body. What are their speed and direction just after the collision?
What is the magnitude of the momentum of
a. A truck traveling at ?
b. A baseball thrown at ?
An object at rest explodes into three fragments. FIGURE EX11.32 shows the momentum vectors of two of the fragments. What is the momentum of the third fragment? Write your answer using unit vectors.
A ball collides with a wall. FIGURE EX11.13 shows the ball’s velocity and the force exerted on the ball by the wall. What is , the ball’s rebound velocity?
Two particles collide and bounce apart. FIGURE EX11.31 shows the initial momenta of both and the final momentum of particle 2. What is the final momentum of particle 1? Write your answer using unit vectors.
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