A mass m moves in a horizontal circle of radiuss r inside a frictionless cone of angle 2t. Determine the speed of the mass.(adsbygoogle = window.adsbygoogle || []).push({});

I drew the free body diagram for the mass. Normal force points toward the center in the same direction as the acceleration. Gravity points down.

x) N = m*v^2/r

I don't know why, but gravity is the only force acting in the vertical direction. There is nothing to balance it out.

I know that I will need to use the angle 2t somehow, but I don't know what to do.

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# Circular Motion and speed of mass

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