A block B is pushed momentarily along a horizontaly surface with an initial velocity V. If μ is the coefficient of sliding friction between B and the surface, block B will come to rest after a time (a) g μ /V (b) g/V (c) V/g (d) V/(g μ).

Answer: (d). Retardation due to friction: a = μ g. 0 = V - μ g t t = (V)/(μ g), so the answer is (d).

A block B is pushed momentarily along a horizontaly surface with an… | NEET 2007 (AIPMT)

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Friction Basics

A block B is pushed momentarily along a horizontaly surface with an initial velocity V. If $\mu$ is the coefficient of sliding friction between B and the surface, block B will come to rest after a time

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Answer: (d)

Retardation due to friction: $a = \mu g$ .
$0 = V - \mu g t$
$t = \dfrac{V}{\mu g}$ , so the answer is (d).

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Friction Basics question from NEET 2007 (AIPMT)

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