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A block can slide on a smooth inclined p...

A block can slide on a smooth inclined plane of inclination `theta` kept on the floor of a lift. When the lift is descending with a retardation a , the acceleration of the block relative to the incline is

A

The acceleration of block relative to inclined is `( g - a) sin theta `

B

The normal force on block by the incline is `m(g + a) costheta`

C

The acceleration of block relative to ground is g

D

The acceleration of block relative to incline is (` g + a )sin theta `

Text Solution

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The correct Answer is:
B, D
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Knowledge Check

  • The acceleration of 10 kg block on the inclined plane is

    A
    zero
    B
    `4 m//s^(2)`
    C
    `6 m//s^(2)`
    D
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    `mg`
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    `mg tan theta`
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    A
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    B
    `g sin theta-mug cos theta`
    C
    `g sin theta-mug cos theta`
    D
    None of these
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