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# INPHO -2005

Rolling sphere :-

A sphere of radius R is projected up an inclined plane of angle $$\theta$$ with initial speed u and angular velocity $${ \omega }_{ 0 }$$ in the direction such that it will roll up. The coefficient of friction is $$tan(\theta )/7$$ and it is given that u> $${ \omega }_{ 0 }$$ . Give the direction of friction for different parts of motion as sphere rises. Obtain the time for which sphere moves up the plane till it stops.

Note by Tushar Gopalka
1 year, 12 months ago

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How did you solve it? · 1 year, 11 months ago

Is the answer correct?? · 1 year, 11 months ago

Is the time $$\frac { 19u+2R{ \omega }_{ 0 } }{ 21gsin{ \theta } }$$ ???? · 1 year, 11 months ago

Answer pls · 1 year, 11 months ago