A cubical block of mass M and edge a slides down a rough inclined plane of inclination 0 with a uniform velocity.
A cubical block of mass M and edge a slides down a rough inclined plane of inclination 0 with a uniform velocity. The torque of the normal force on the block about its centre has a magnitude
(a) zero
(b) Mga
(c) Mga sinθ
(d) 1/2Mga sinθ.
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