A small block of mass m is kept on a rough inclined surface of inclination 0 fixed in an 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 (c) mgut sin e (d) mgvt sin 20.
A small block of mass m is kept on a rough inclined surface of inclination 0 fixed in an 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 (c) mgut sin e (d) mgvt sin 20.
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Transcribed Image Text:A small block of mass m is kept on a rough inclined
surface of inclination 0 fixed in an 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 0
2
(c)mgvt sin
(d) mgvt sin 20.
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