Question

A block `B` is pushed momentarily along a horizontal 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:

A. `v//g`
B. `v//(gmu)`
C. `gmu//v`
D. `g//v`

Answer 1

Correct Answer - B
By using v=u+at ,
`0=v-mu"gt" implies t=(v)/(mug)`