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A block B is pushed momentarily along a horizontal surface with an initial velocity V. If is the coefficient of sliding friction between B and the surface, block B will come to rest after a time
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- gμ/V
- g/V
- V/g
- V/(gμ).
Correct Option: D
Friction is the retarding force for the block
F = ma = µR = µmg
Therefore, from the first equation of motion
v = u – at
0 = V – µg × t ⇒ V/μg = t
