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Chapter 8: Linear Momentum and Collisions

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College Physics (Urone)
Pages: 265 - 292

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35 Questions for Chapter 8: Linear Momentum and Collisions

  1. Momentum for a system can be conserved in one direction while not being conserved in another. What is the angle between the directions? Givean example.

    Found on Page 287
  2. Explain in terms of momentum and Newton’s laws how a car’s air resistance is due in part to the fact that it pushes air in its direction of motion.

    Found on Page 287
  3. Can objects in a system have momentum while the momentum of the system is zero? Explain your answer.

    Found on Page 287
  4. Must the total energy of a system be conserved whenever its momentum is conserved? Explain why or why not.

    Found on Page 287
  5. What is an elastic collision?

    Found on Page 287
  6. What is an inelastic collision? What is a perfectly inelastic collision?

    Found on Page 287
  7. Mixed-pair ice skaters performing in a show are standing motionless at arms length just before starting a routine. They reach out, clasp hands, and pull themselves together by only using their arms. Assuming there is no friction between the blades of their skates and the ice, what is their velocity after their bodies meet?

    Found on Page 287
  8. A small pickup truck that has a camper shell slowly coasts toward a red light with negligible friction. Two dogs in the back of the truck are moving and making various inelastic collisions with each other and the walls. What is the effect of the dogs on the motion of the center of mass of the system (truck plus entire load)? What is their effect on the motion of the truck?

    Found on Page 287
  9. Starting with the definitions of momentum and kinetic energy, derive an equation for the kinetic energy of a particle expressed as a function of its momentum.

    Found on Page 289
  10. Suppose a fireworks shell explodes, breaking into three large pieces for which air resistance is negligible. How is the motion of the center of mass affected by the explosion? How would it be affected if the pieces experienced significantly more air resistance than the intact shell?

    Found on Page 288

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