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Physics - Rotation Question with Solution | TestHub

PhysicsRotationRotational KinematicsEasy2 minPYQ_2020

PhysicsEasysingle choice

A wheel rotating at $12 rev s^{- 1}$ is brought to rest in $6 s$ . The average angular deceleration in $rad s^{- 2}$ of the wheel during this process is

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Answer:

Solution:

$ω_{i} = 12 \times 2 π rad s^{- 1}$

$= 24 π rad s^{- 1}$

$ω_{f} = 0$

$∆ t = 6 s$

As $ω_{f} = ω_{i} + α ∆ t$

We have, $α = \frac{- ω_{i}}{Δ t}$

$= - \frac{24 π}{6}$

$= - 4 π rad \sec^{- 2}$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:RotationSubtopic:Rotational Kinematics

⏱ 2mℹ️ Source: PYQ_2020

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