A conveyed belt of length lis moving with velocity v.a block of mass is pushed against the motion of conveyed belt with velocity `v_(0)` form end B Co- efficient of friction between block and belt is u the value of `v_(0)` so that the amount of heat liberated as a result of retardation of the block by conveyed belt is maximum is

A lift moving with a uniform velocity v in which a block of mass m is lying .The friction force offered by the when coefficient of friction is mu = 0.5 will be

A solid sphere of mass m and radius R is gently placed on a conveyer belt moving with constant velocity v_(0) . If coefficient of friction between belt and sphere is 2//7 the distance traveled by the centre of the sphere before it starts pure rolling is

A block mass m = 2 kg is moving with velocity v_(0) towards a massless unstretched spring of the force constant k = 10 N//m . Coefficient of friction between the block and the ground is mu = 0.2 . Find the maximum value of v_(0) so that after pressing the spring the block does not return back but stops there permanently.

A block of mass m is placed gently onto a long plank of mass M moving with a velocity v_(0) on a smooth horizontal floor. If friction is present between M and m :

A long conveyer belt moves with a constant velocity of 8 ms^(-1) .Two blockA and B each of mass 2kg are placed gently on the belt with B on A, initail velocity of block is zero Coefficient of friction between A and belt is 0.1 There is no friction between A and B length of A is 4m If the coefficient of friction between the block B and belt is 0.4 Find the separation between the two block when B come to rest w.r.t. belt

A block of mass m is pushed towards the movable wedge of mass M and height h , with a velocity v_(0) . All surfaces are smooth . The minimum value of v_(0) for which the block will reach the top of the wedge is

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: