Physics - Rotation Question with Solution | TestHub

PhysicsRotationTorque / angular accelerationHard2 minPYQ_2019
PhysicsHardsingle choice

A particle of massmis moving along a trajectory given by
x=x0+a cosω1t
y=y0+b sinω2t
The torque, acting on the particle about the origin, att=0is:

Options:

Answer:
A
Solution:

x=x0+a cosω1t
y=y0+b sin ω2t
ax=-a ω12cos ω1t
ay=-b ω22sin ω2t
Att=0,
F→=ma→=-a ω12 i^
And
r→=x0+ a i^+y0 j^
Torque,τ=r→×F→
τ=x0+ a i^+y0 j^×-a ω12 i^
=my0 aω12 k^

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

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