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Physics - Circular Motion Question with Solution | TestHub

PhysicsCircular MotionDynamicsMedium2 minPYQ_2020
PhysicsMediumsingle choice

A bead of mass m stays at point Pa, b on a wire bent in the shape of a parabola y=4Cx2 and rotating with angular speed ω (see figure). The value of ω is (neglect friction)

 

Question diagram: A bead of mass m stays at point P a , b on a wire bent in th

Options:

Answer:
A
Solution:

mω2acosθ=mgsinθ

ω=gtanθa

y=4cx2

tanθ=dydx=8xC

(tanθ)a,b=8aC

ω=g×8aca=22gC

Stream:JEESubject:PhysicsTopic:Circular MotionSubtopic:Dynamics
2mℹ️ Source: PYQ_2020

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