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PhysicsW.E.P.Calculation of workMedium2 minPYQ_2014

PhysicsMediumsingle choice

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:

Options:

Answer:

Solution:

$W_{f} = f sin θ S$ $= (mg sin θ) (sin θ) (vt)$ $= mg sin^{2} θ vt$

Stream:BITSATSubject:PhysicsTopic:W.E.P.Subtopic:Calculation of work

⏱ 2mℹ️ Source: PYQ_2014

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