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Physics - Rotation Question with Solution | TestHub

PhysicsRotationRotational KinematicsEasy2 minPYQ_2020

PhysicsEasysingle choice

On the application of a constant torque, a wheel is turned from rest to $400 rad$ in $10 s$ . If same torque continues to act, the angular velocity of the wheel after $20 s$ from the start is

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Answer:

Solution:

By using the following equation,
$θ = ω_{0} t + \frac{1}{2} α t^{2}$

$α = 8 rad s^{- 2}$

$Also, ω = ω_{0} + αt$

Here $ω_{0} = 0$ , $α = 8 rad s^{- 2}$ and $t = 20 s$

$∴ ω = 0 + 8 \times 20 = 160 {rad s}^{- 1}$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:RotationSubtopic:Rotational Kinematics

⏱ 2mℹ️ Source: PYQ_2020

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