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PhysicsJEE Main 24 Jan 2026, Shift 1·Q16·MCQ·Moderate

Rotational Motion · Rotational dynamics

Two masses 400 g and 350 g are suspended from the ends of a light string passing over a heavy pulley of radius 2 cm. When released from rest the heavier mass is observed to fall 81 cm in 9 s. The rotational inertia of the pulley is kg.m2\mathrm{kg.m^2}.
(g=9.8 m/s2g = 9.8\ \mathrm{m/s^2})
  1. (1)9.5×10−39.5\times10^{-3}
  2. (2)4.75×10−34.75\times10^{-3}
  3. (3)1.86×10−21.86\times10^{-2}
  4. (4)8.3×10−38.3\times10^{-3}

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