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A small block of mass m is kept on a rou...

A small block of mass m is kept on a rough inclined surface of inclination `theta` fixed in an elevator. The elevator goes up with a uniform velocity v and te block does not slide n te wedge. The work done by the force of friction on the block in time t will be

A

Zero

B

`mg vt cos^(2) theta`

C

`mg vt sin^(2) theta`

D

`mg vt sin 2 theta`

Text Solution

Verified by Experts

The correct Answer is:
C
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Knowledge Check

  • A small block of mass m is kept on a rough inclined surface of inclination q fixed in a elevator. The elevator goes up with a uniform velocity v and the block does not slide on the wedge. The work done by the force of friction on the block in time t will be :

    A
    zero
    B
    `mgvt cos^2 theta `
    C
    `mgvt sin^2 theta `
    D
    `mgvt sin 2 theta `

  • A small block of mass m is kept on a rough inclined surface of inclination theta in an elevator.Th elevator goes up with a uniform velocity v and the block does not slide on the wedge.The work done by the force of friction on the block in time t as seen by the observer on the inclined plane will be

    A
    zero
    B
    mgvt `cos^(2)theta`
    C
    mgvt `sin^(2)theta`
    D
    mgvt sin 2`theta`

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    A
    Zero
    B
    `9.8J`
    C
    `29.4J`
    D
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