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Circular Motion question

2020 · 8 Jan · Shift 1 · Q56
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  5. /2020 · 8 Jan · Shift 1 · Q56

Circular Motion question

2020 · 8 Jan · Shift 1 · Q56

JEE MainPhysicsCircular MotionMCQ+4 / −1
A particle of mass m is fixed to one end of a light spring having force constant k and unstretched length ℓ\ellℓ. The other end is fixed. The system is given an angular speed ω\omegaω about the fixed end of the spring such that it rotates in a circle in gravity free space. Then the stretch in the spring is :
  1. A
    mℓω2k−mω2{{m\ell {\omega ^2}} \over {k - m{\omega ^2}}}k−mω2mℓω2​
  2. B
    mℓω2k−mω{{m\ell {\omega ^2}} \over {k - m{\omega}}}k−mωmℓω2​
  3. C
    mℓω2k+mω2{{m\ell {\omega ^2}} \over {k + m{\omega ^2}}}k+mω2mℓω2​
  4. D
    mℓω2k+mω{{m\ell {\omega ^2}} \over {k + m{\omega}}}k+mωmℓω2​
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