1. If two particles have equal kinetic energies, are their momenta necessarily equal? Explain.
2. If two particles have equal momenta, are their kinetic energies necessarily equal? Explain.
3. An isolated system is initially at rest. Is it possible for parts of the system to be in motion at some later time? If so, explain how this might occur.
4. If two objects collide and one is initially at rest, is it possible for both to be at rest after the collision? Is it possible for one to be at rest after the collision? Explain.
5. Is it possible to have a collision in which all of the kinetic energy is lost? If so, cite an example.
6. Consider a perfectly inelastic collision between a car and a large truck. Which vehicle loses more kinetic energy as a result of the collision?
7. A piece of mud is thrown against a brick wall and sticks to the wall. What happens to the momentum of the mud? Is momentum conserved? Explain.
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