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 block B is pushed momentarily along a horizontal surface with an ini

1.	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 ?
Answer» `(g mu)/(V)` `(g )/(v)` `(v)/(g)` `(v)/(g mu)` SOLUTION :Initialvelocityof ABLOCK= `v_(0)= v` Finalvelocityv= 0 Now v= `v_(0)+ at` `0 =v - at` `a= (0-v)/(t ) =- (v )/(L )` Nowfrictionforcef= `mu` R= `mu` mg`(:. , R = mg ) ` `:. ,` Retardation- ma = `mu mg` from equation (1) and (2) `(v)/( t ) = mu g `(Avoiding-sign) `t= (v ) /(mu g)`