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Three blocks of masses 3 kg, 6 kg and 1 ...

Three blocks of masses 3 kg, 6 kg and 1 kg are connected by a string passing over two smooth pulleys attached at the two ends of the horizontal surface. If the co-efficient of friction between the block and the surface is 0.6, the frictional force acting on the block of mass 6 kg is

A

36 N

B

30 N

C

20 N

D

10 N

Text Solution

Verified by Experts

`f_(s("max"))=muMg =0.6 xx 6xx10=36N`
`T_(1)=10N and T_(2)=30N`
Frictional force, `f=30-10=20N`
Since `20lt f_(s("max"))`
`therefore f_(s)=20N`
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Knowledge Check

  • A block of mass 6 kg is being pulled by force 24 N as shown . If coefficient of friction between the block and the surface is 0.6 , frictional force acting on the block is :

    A
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  • Two blocks of masses 3 kg and 6 kg are connected by a string as shown in the figure over a frictionless pulley. The acceleration of the system is

    A
    `4m//s^(2)`
    B
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    C
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    D
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  • Two blocks of masses of 40 kg and 30 kg are connected by a weightless string passing over a frictionless pulley as shown in the figure.

    A
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    B
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    C
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    D
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