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Physics - Rotation Question with Solution | TestHub

PhysicsRotationRotational KinematicsEasy2 minQB

PhysicsEasynumerical

The instantaneous velocity of point $B$ of the given rod of length $0.5 m$ is $3 m s^{- 1}$ in the represented direction. What is the angular velocity (in $rad s^{- 1}$ ) of the rod for the minimum possible magnitude of the velocity of the end $A$ ?

Answer:

5.20

Solution:

If rod is rotated about end A, then vertical component of velocity, $v_{⊥}$ of end a will be zero.

$∴ ω = \frac{v {\sin 60}^{o}}{l} = \frac{\sqrt{3} v}{2 l}$

$= \frac{\sqrt{3} \times 3}{2 \times 0.5} = 5.2$ $rad s^{- 1}$

Stream:JEESubject:PhysicsTopic:RotationSubtopic:Rotational Kinematics

⏱ 2mℹ️ Source: QB

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