Q.
If an object starts from rest and covers angle of 60 rad in 10s in circular motion, then magnitude of its angular acceleration will be [JIPMER 2019]
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a
1.2 rad s-2
b
1.5 rad s-2
c
2 rad s-2
d
2.5 rad s-2
answer is A.
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Detailed Solution
Given, initial angular velocity of object, ω0=0Angular displacement, θ=60radand Δt=10sFrom equation of rotational motion, θ=ω0t+12αt260=0×t+12×α×102⇒ α=6050⇒α=1.2rads−2
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