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NEET UG PHYSICS MCQ: SYSTEM OF PARTICLES

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Three identical sphere lie at rest along a line on a smooth horizontal surface. The separation between any two adjacent spheres is L. The first sphere is moved with a velocity u towards the second sphere at time t=0. The coefficient of restitution for collision between any two blocks is 1/3. Then choose the correct statement

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Correct option: A

The third sphere will start moving at

t = \frac{{5L}}{{2u}}

Option A (The third sphere will start moving at

t = \frac{{5L}}{{2u}}

) is correct because it accounts for the time taken for the collisions and the subsequent motion of the spheres with reduced velocities due to the coefficient of restitution.

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