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Find the minimum acceleration of the wed...

Find the minimum acceleration of the wedge, so that the block is under free fall (assume all surfaces tivate v are smooth).

A

` a_("min") = gcottheta`

B

` a_("min") = "g"tantheta`

C

Force of contact between the block and wedge is zero

D

Force of contact between the block and horizontal surface is equal to the weight of the wedge

Text Solution

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The correct Answer is:
A, C, D
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Knowledge Check

  • A block of mass 5 kg is kept against an accelerating wedge with a wedge angle of 45^(@) to the horizontal. The coefficient of friction between the block and the wedge is mu = 0.4 . What is the minimum absolute value of the acceleration of the wedge to keep the block steady? [Assume, g = 10 m/s^(2) ]

    A
    `(60)/(7)m//s^(2)`
    B
    `(30)/(7)m//s^(2)`
    C
    `(30)/(sqrt(7))m//s^(2)`
    D
    `(60)/(sqrt(7))m//s^(2)`

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