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A small block of mass m is kept on a rough inclined surface of inclination θ. The block does not slide on the surface. The work done by friction on block in time t will bea) Zerob) -mgvt sinθ.cosθc) mgvt sin ²θd) mgvt cos2θ

Answer» A small block of mass m is kept on a rough inclined surface of inclination θ. The block does not slide on the surface. The work done by friction on block in time t will be

a) Zero
b) -mgvt sinθ.cosθ
c) mgvt sin ²θ
d) mgvt cos2θ


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