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Question: In a perfectly inelastic one-dimensional collision


In a perfectly inelastic one-dimensional collision between two objects, what initial condition alone is necessary so that all of the original kinetic energy of the system is gone after the collision?
(a) The objects must have momenta with the same magnitude but opposite directions.
(b) The objects must have the same mass.
(c) The objects must have the same velocity.
(d) The objects must have the same speed, with velocity vectors in opposite directions.

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