Question

A block B is pushed momentarily along a horizontal 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. gµ/v
• B. g/v
• C. v/g
• D. v/gµ

Answer 1

Answer: (D)

v/gµ

Answer 2

Time after block

will come to rest =$\frac{v}{\mu g}$

[Note retardation a = $\frac{\mu mg}{m}$= g]