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a. An astronaut holding a heavy object floats in empty space. When he throws the object,...

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Physics

  1. a. An astronaut holding a heavy object floats in empty space.When he throws the object, he finds himself moving in the oppositedirection. Explain, using conservation of momentum, why thisoccurs.

  2. b. A system starts with a net momentum of zero and is onlyaffected by internal forces. After a series of events, what mustthe net momentum of the system be? If the forces are external, whyis this not necessarily the case?

  3. c.A box slides along ice at a rate of 5m/s. After experiencing aperfectly elastic collision with another box, the second box slideswith a rate of 5m/s. What must be true of the masses of these twoboxes? Explain.

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