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Toppling

Question

A cubical block of mas ‘M’ and edge ‘a’ slides down a rough inclined plane of inclination 'θ'  with a uniform velocity. The torque of the normal force on the block about its center has a magnitude

Moderate
Solution

Since the block does not to topple, torque produced by normal forces
  = Torque produced by frictional force  fK
=mgsinθ×a2.



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