# A horizontal force of 210N is exerted on a 2.0 kg discus as it rotates uniformaly in a horizontal circle ( at arm's length ) of radius .90 m. Calculate the speed of the discus

A horizontal force of 210N is exerted on a 2.0 kg discus as it rotates uniformaly in a horizontal circle ( at arm's length ) of radius .90 m. Calculate the speed of the discus
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insonsipthinye
F=ma
$F=m\frac{{v}^{2}}{r}$
, then solve for velocity
$v=\sqrt{\frac{Fr}{m}}=\sqrt{\frac{210\left(.9\right)}{2}}=9.72\frac{m}{s}$