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sachin123
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Homework Statement
cubical block of mass m ,edge a,slides down the inclined plane of inclination [tex]\varphi[/tex] with uniform velocity.
torque of normal reaction on the block about its centre is?
The Attempt at a Solution
Torque=mgcos[tex]\varphi[/tex] X a/2
mgcos[tex]\varphi[/tex]sin[tex]\varphi[/tex]a/2
Book says:
mgsin[tex]\varphi[/tex]a/2