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The 'e' Equation

Two small sph...

Question

Two small spheres of equal mass, and heading towards each other with equal speeds, undergo a headon collision (no external force acts on system of two spheres). Then which of the following statement is correct?

A

Their final velocities must be zero

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B

Their final velocities may be zero

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C

Each must have a final velocity equal to the others initial velocity

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D

Their velocities must be reduced in magnitude

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Solution

The correct option is B Their final velocities may be zero
Nothing is mentioned about coefficient of restitution.
Hence the only true statement is 'their final velocities may be zero.'

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