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elena-s [515]
3 years ago
9

A wheel accelerates uniformly from rest to a rotational speed of 10 rad/s in 5 s. What is its angular acceleration?

Physics
1 answer:
ioda3 years ago
3 0

Answer:

angular acceleration=2 \frac{rad}{s^{2} }

Explanation:

Kinematic equation for uniformly accelerated circular motion:

wf=wi+\alpha *t

wf=final angular speed (\frac{rad}{s} )

wi=initial angular speed (\frac{rad}{s} )

\alpha= angular acceleration (\frac{rad}{s^{2} } )

We replace wf=10\frac{rad}{s},wi=0, t=5s in the equation(1):

10=0+\alpha *5

\alpha =\frac{10}{5}

\alpha =2 \frac{rad}{s^{2} }

The angular acceleration is 2 \frac{rad}{s^{2} }

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