Home
Class 11
PHYSICS
A long block A is at rest on a smooth ho...

A long block A is at rest on a smooth horizontal surface. A small block B, whose mass is half of A, is placed on A at one end and projected along A with some velocity u. The coefficient of friction between the blocks is `mu`:

A

the blocks will reach a final common velocity u/3

B

the work done against friction is two-third of the initial kinetic energy of B

C

before the block reach a common velocity the acceleration of A relative to B is (2//3) `mu` g

D

before the blocks reach a common velocity, the accelerartion of A relative to B is `(3//2)mug`

Text Solution

Verified by Experts

Promotional Banner

Similar Questions

Explore conceptually related problems

A long block A of mass M is at rest on a smooth horizontal surface.A small block B of mass M//2 is placed on A at one end and projected along A with some veklocity v.The coefficient of friction between the block is mu then , the accelerations of blocks A and B before reaching a common velocity will be respectively

A long block A is at rest on a smooth horizontal surface. A small block B whose mass is half of mass of A is placed on A at one end and is given an initial velocity u as shown in figure. The coefficient of friction between the blocks is mu .

Four block are arranged on a smooth horizontal surface as shown in figure .The masses of the blocks are given (see the fig ) The coefficient of static friction between the top and the bottom blocks is mu_(s) What is the maximum value of the horizontal force F applied to one of the bottom blocks as shown that makes all four block with the same acceleration ?

A varying horizontal force F = at act on a block of mass m kept on a smooth horizontal surface An identical block is kept on the first block. The coefficient of friction between the blocks is mu . The time after which the relative sliding between the blocks prevails is

A block P of mass m is placed on a smooth horizontal surface. A block Q of the same mass is placed over the block P and the coefficient of static friction between them is mu . A spring of spring constant K is attached to block Q. The blocks are displaced together to a distance A and released. The upper block oscillates without slipping over the lower block. The maximum frictional force between the block is:

A wedge shaped block A' of mass M is at rest on a smooth horizontal surface. A small block 'B' of mass 'm' placed at the top edge of inclined plane of length 'l' as shown in the figure. By the time, the block 'B' reaches the bottom end, the wedge A moves a distance of:

A wedge B of mass 2 m is placed on a rough horizontal suface. The coefficient of friction between wedge and the horizontal surface is mu_(1) . A block of mass m is placed on wedge as shown in the figure. The coefficient of friction between block and wedge is mu_(2) . The block and wedge are released from rest. Q. Suppose the inclined surface of the wedge is at theta=37^(@) angle from horizontal and mu_(2)=0.9 then the wedge:

A wedge B of mass 2 m is placed on a rough horizontal suface. The coefficient of friction between wedge and the horizontal surface is mu_(1) . A block of mass m is placed on wedge as shown in the figure. The coefficient of friction between block and wedge is mu_(2) . The block and wedge are released from rest. Q. Suppose the inclined surface of the wedge is at theta=37^(@) from angle from horizontal and mu_(2)=0 are wedge will remain in equilibrium if

A block of mass m is pulled by a force of constant power P placed on a rough horizontal plane. The friction coefficient between the block and the surface is mu . Then

A spring, placed horizontally on a rough surface is compressed by a block of mass m, placed on the same surface so as to store maximum energy in the spring. If the coefficient of friction between the block and the surface is mu , the potential energy stored in the spring is