PHY
Chapter 7

# Chapter 7 - Chapter 7 Linear Momentum 4 A 30.00 kg mass...

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1 Chapter 7 Linear Momentum 4. A 30.00 kg mass falls from a height of 4.000 m. The momentum of the mass just before it hits the ground is: A. 144.2 kg m/s. B. 187.8 kg m/s. C. 320.0 kg m/s. D. 442.4 kg m/s. E. 502.1 kg m/s. 5. A 3.000 kg ball is pitched with a kinetic energy of 20.00 Joules. Then the momentum of the ball is: 6. If the momentum of a ball is doubled, then the kinetic energy is: 8. A 4.00 kg ball is traveling at 5.00 m/s and strikes a wall. The 4.00 kg ball bounces off the wall with a velocity of 4.0 m/s. The magnitude of the change in momentum of the ball is:

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2 10. A 4.00 kg ball is traveling at 3.00 m/s and strikes a wall. The 4.00 kg ball bounces off the wall with a velocity of 4.0 m/s. If the contact with the wall by the ball lasts for 0.10 seconds, then the average force on the ball is: A. 230 N. B. 280 N. C. 320 N. D. 360 N. E. 400 N.
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