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Rotational Motion question

2019 · 12 Apr · Shift 1 · Q45
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  5. /2019 · 12 Apr · Shift 1 · Q45

Rotational Motion question

2019 · 12 Apr · Shift 1 · Q45

JEE MainPhysicsRotational MotionMCQ+4 / −1
A person of mass M is, sitting on a swing of length L and swinging with an angular amplitude θ\thetaθ 0. If the person stands up when the swing passes through its lowest point, the work done by him, assuming that his center of mass moves by a distance ℓ\ellℓ(ℓ\ellℓ << L), is close to;
  1. A
    mg ℓ\ellℓ(1 + θ\thetaθ 02)
  2. B
    mg ℓ\ellℓ
  3. C
    mg ℓ\ellℓ(1 + θ022{{\theta _0^2} \over 2}2θ02​​)
  4. D
    mg ℓ\ellℓ(1 - θ\thetaθ 02)
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