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Physics - Rotation Question with Solution | TestHub

PhysicsRotationRotational KinematicsEasy2 minPYQ_2017

PhysicsEasysingle choice

A flywheel at rest is to reach an angular velocity of $24 rad s^{- 1}$ in $8 s$ with constant angular acceleration. The total angle turned through during this interval is

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Answer:

Solution:

$ω_{0} = 0, ω = 24 rad s^{- 1}, t = 8 s$
$∴ α = \frac{ω - ω_{0}}{t} = \frac{24}{8} = 3 {rad s}^{- 2}$
$θ = ω_{0} t + \frac{1}{2} α t^{2}$
$= 0 + \frac{1}{2} \times 3 \times {(8)}^{2}$
$= \frac{3 \times 64}{2} = 96 rad .$

Stream:MHT_CETSubject:PhysicsTopic:RotationSubtopic:Rotational Kinematics

⏱ 2mℹ️ Source: PYQ_2017

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