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If friction between pulley and string is...

If friction between pulley and string is sufficient to allow pure rolling then acceleration of pulley ‘A’ will be –

A

`(2g)/(7)`

B

`(4g)/(5)`

C

`(4g)/(7)`

D

`(2g)/(3)`

Text Solution

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The correct Answer is:
A
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Knowledge Check

  • The acceleration of light pulley is

    A
    F/m
    B
    F/2m
    C
    F/4 m
    D
    F/8 m

  • Coefficient of friction between pulley and light string is mu_(1) . Calculate minimum coefficient of friction between block A and ground such that system can be in equibrium.

    A
    `mu=2`
    B
    `mu=2e^((-mupi)/(2))`
    C
    `mu=e^((mu_(1)pi)/(2))`
    D
    `mu=(3)/(2)`

  • In the shown mass pulley system, pulleys and string are massless. The one end of the string is pulled by the force F = mg. The acceleration of the block will be :

    A
    `g//2`
    B
    0
    C
    g
    D
    3g

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