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A small body of mass 'm' canslide withou...

A small body of mass 'm' canslide without friction along a trough bent which is in the form of a semi circular arc of radius (R). At height h will the body be at rest with respect to the trough, if the trough rotates with uniform angular velocity `omega` about a vertical axis. If `h = R- (g)/(omega^(n))` Then the value of n is -

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