An athlete throws a discus from rest to a final angular velocity of 15 ${rads}^{- 1}$ in 0.270 s before releasing it. During acceleration, discus moves a circular arc of radius 0.810 m Acceleration of discus before it is released is …. ${ms}^{- 2}$

Question

Dr. Abubacker · Accepted Answer

(a) $\omega = \omega_{0} + \alpha t$
$\Rightarrow$ $\omega = 0 + \alpha t$
$\Rightarrow$ $\alpha = \frac{15}{0.270}\ rads^{- 2}$
Now, $a = r,\ \alpha = 0.81 	imes \frac{15}{0.270} = 45\ ms^{- 2}$

Q. An athlete throws a discus from rest to a final angular velocity of 15 ${rads}^{- 1}$ in 0.270 s before releasing it. During acceleration, discus moves a circular arc of radius 0.810 m Acceleration of discus before it is released is …. ${ms}^{- 2}$

Explanation

Reviewed by Dr. Abubacker

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