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 _______ .

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Solution

Q.
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 _______ ${kg·m}^{2}$ .

$(g = 9.8 {m/s}^{2})$ [2026]

1 $4.75 \times 10^{- 3}$

2 $8.3 \times 10^{- 3}$

3 $9.5 \times 10^{- 3}$

4 $1.86 \times 10^{- 2}$

Ans.
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