Two masses 400 g and 350 g are suspended... | Rotational Motion

JEE MAIN 2026

24-1-2026 S1

Question

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 $\_\_\_\_$ $\mathrm{kg} \cdot \mathrm{m}^2 \cdot\left(\mathrm{~g}=9.8 \mathrm{~m} / \mathrm{s}^2\right)$

Select the correct option:

$9.5 \times 10^{-3}$

$4.75 \times 10^{-3}$

$1.86 \times 10^{-2}$

$8.3 \times 10^{-3}$

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution