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There are hundred identical blocks equally spaced on a frictionless track as shown in the figure. Initially all the blocks are separate. Each collision is perfectly inelastic. The final velocity will be

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$\frac{V}{100}$

$\frac{V}{99}$

Zero

answer is B.

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Detailed Solution

$\begin{array}{l} P_{i} = P_{f} \\ ∴ mv = (100 m) V_{f} \\ or V_{f} = \frac{V}{100} \end{array}$

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