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physics

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Determine for each of the following statements whether it is always true or can be false.

In a perfectly inelastic collision, the kinetic energy is conserved.

Kinetic energy is conserved in an elastic collision.

Two objects of different masses but moving at the same velocity have different momentum.

In an elastic collision the momentum is not conserved.

Momentum of a system may be conserved even when mechanical energy is not.

  • physics - ,

    no - in an ELASTIC collision KE is conserved

    Yes as I just said

    Yes m V1 is not m V2

    NO -in ANY old collision momentum is conserved

    Yes, in in inelastic collision momentum is conserved and energy is not (escapes as heat)

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