In an elastic collision (a) the initial kinetic energy is equal to the final kinetic energy

Monjur Alahi

In an elastic collision 

(a) the initial kinetic energy is equal to the final kinetic energy 

(b) the final kinetic energy is less than the initial kinetx energy 

(c) the kinetic energy remains constant 

(d) the kinetic energy first increases then decreases


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Salim Ahmed Kawsar

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(a) the initial kinetic energy is equal to the final kinetic energy 

Explanation: 

The initial kinetic energy before the collision and the final kinetic energy after the collision will remain the same. We cannot say that (c) is true because during the contact a part of the kintic energy is stored as elastic potential energy in the bodies, and at this time total kinetic energy is less than the initial or final kinetic energy.

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