Physics - Circular Motion Question with Solution | TestHub

PhysicsCircular MotionDynamicsEasy2 minPYQ_2020
PhysicsEasysingle choice

A spring mass system (massm,spring constantkand natural lengthl) rests in equilibrium on a horizontal disc. The free end of the spring is fixed at the centre of the disc. If the disc together with spring mass system rotates about it's axis with an angular velocityω,k>>mω2the relative change in the length of the spring is best given by the option:

Options:

Answer:
C
Solution:

mω2l0+x=kx
l0x+1=kmω2
x=l0mω2k-mω2
kmω2
So, xl0 is equal to mω2k

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

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