A flywheel gains a speed of 540rpm in 6 sec. Its angular acceleration will be :
3πrads−2
9πrads−2
18πrads−2
54πrads−2
A
54πrads−2
B
3πrads−2
C
18πrads−2
D
9πrads−2
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Solution
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From
first equation of circular motion, we get
ω=ω0+αt
α=ω−ω0t
=5400×2π60×60
=3πrad/s2
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