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There block A B ,and C of equal mass m a...

There block A B ,and C of equal mass `m` are placed one over the other on a frictionless surface (table) as shown in figure The coefficient of friction between any blocks A ,B and C is `mu` The maximum value of mass of block D so that the blocks A,B and C move without slipping over each other is

A

`(3 m mu)/(mu + 1)`

B

`(3 m(1 - mu))/(mu)`

C

`(3 m(1 + mu))/(mu)`

D

`(3 m mu)/((1 - mu)`

Text Solution

Verified by Experts

The correct Answer is:
d

Maximum acceleration of B of C can be `mg `so that they do not slip with each other or A
For the system of `(A + B+ C)`
`T = 3 ma = 3mu mg`
For D
`Mg - T = Ma`
`rArr Mg - 3mu mg = M mu g`
`rArr M = (3 mu m)/(1 - mu)`
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