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Homework Help: Energy in collisions - which statement is true

  1. Jun 15, 2010 #1
    1. The problem statement, all variables and given/known data

    Which of the following statements is true for collisions?
    a) Momentum and Kinetic energy are always conserved in collisions.
    b) Momentum can only conserved in elastic collisions.
    c) Kinetic energy is conserved only in inelastic collisions.
    d) Only kinetic energy can be conserved in elastic collisions.
    e) None of these are true for collisions.

    3. The attempt at a solution
    i believe the answer is e. but thought it could be c but then momentum can also be conserved so i concluded e
  2. jcsd
  3. Jun 15, 2010 #2


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    Homework Helper

    Re: collisions

    Yes e is correct.

    Kinetic energy is not conserved in an inelastic collision.
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