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Question
In an elastic collision
Options
the initial kinetic energy is equal to the final kinetic energy
the final kinetic energy is less than the initial kinetic energy
the kinetic energy remains constant
the kinetic energy first increases then decreases.
Solution
the final kinetic energy is less than the initial kinetic energy
As some energy is loss into heat in an inelastic collision, the final kinetic energy is less than the initial kinetic energy.
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