Laws of MotionMedium
Question
There block A, B and C of equal m are placed one over the other on a smooth horizontal ground shown in figure. Coefficient of friction between any two block of A, B and C is
. The maximum value of mass of block D so that the block A, B and C move without slipping over each other is


Options
A.6 m
B.5 m
C.3 m
D.4 m
Solution
Block A and C both move due to friction. Hence less friction is available to A as com pared to C. Maximum acceleration of A = μg =
But acceleration of system a =
⇒
=
⇒ mD = 3m
But acceleration of system a =
⇒
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