BITSAT 2014 Paper

Section: Physics

Question : 6 of 150

Marks: +1, -0

A small block of mass m is kept on a rough inclined surface of inclination θ 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 :

zero
mgvt cos2θ
mgvt sin2θ
mgvt sin 2θ

Validate

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