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A uniform hemisphere placed on an inclin...

A uniform hemisphere placed on an incline is on verge of sliding. The coefficient of friction between the hemisphere and the incline is `mu = 0.3`.
Find the angle `phi` that the circular base of the hemisphere makes with the horizontal.
Given `sin (tan^(-1) 0.3) cong 0.29 " and "sin^(-1) (0.77) cong 50^(@)`

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The correct Answer is:
`50^(@)`
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