Physics - Rotation Question with Solution | TestHub

PhysicsRotationTorque / angular accelerationHard2 minPYQ_2019
PhysicsHardsingle choice

A uniform rod of length ‘6L’ and mass ‘8m’ is pivoted at its centre ‘C’. Two masses ‘m’ and ‘2m’ with speed2v,andv,as shown strikes the rod and stick to the rod. Initially, the rod is at rest. Due to impact, if it rotates with angular velocity ‘ω1’, then ‘ω’ will be.

Options:

Answer:
A
Solution:

From angular momentum conservation:
2mvL+m2v2L=8m6L122+2mL2+m2L2ω
⇒ω=v5L

Stream:MHT_CETSubject:PhysicsTopic:RotationSubtopic:Torque / angular acceleration
⏱ 2mℹ️ Source: PYQ_2019

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