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A block of mass m is stationary with res...

A block of mass m is stationary with respect to the wedge of mass M moving with uniform speed v on horizontal surface. Work done by friction force on the block in t seconds is

A

zero

B

`-(mgvt)/2 sin2theta`

C

`-(mgvt)/2 `

D

`-(mgvt)/4 sin2theta`

Text Solution

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The correct Answer is:
B
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Knowledge Check

  • A block of mass m rests on a stationary wedge of mass M. The wedge can slide freely on a smooth horizontal surface as shown in figure. If the block starts from rest

    A
    (a) the position of the centre of mass of the system will change
    B
    (b) the position of centre of mass of the system will change along the vertical but not along the horizontal
    C
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    D
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  • Block of mass m is stationary w.r.t. wedge. Normal force exerted by wedge on the block is

    A
    `mg cos theta`
    B
    `(mg)/(cos theta)`
    C
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    D
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  • A block of mass m is placed on another block of mass M which itself is lying on a horizontal surface .The coefficient of friction between two blocks is mu_(1) and that between the block of mass M and horizontal surfece is mu_(2) What maximum horizontal force can be applied to the lower block move without separation?

    A
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    B
    `(M - m) (mu_(2) - mu_(1))g`
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    D
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