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JEE Main 2003 — Physics Mechanics
A light spring balance hangs from the hook of the other light spring balance and a block of mass M kg hangs from the former one. Then the true statement about the scale reading is
Held on 30 Apr 2003 · Verified 6 Jul 2026.
Both the scales read Mkg each
The scale of the lower one reads Mkg and of the upper one zero
The reading of the two scales can be anything but the sum of the reading will be Mkg
Both the scales read M/2 kg each
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Two masses $m$ and 2 m are connected by a light string going over a pulley (disc) of mass 30 m with radius $r=0.1 \mathrm{~m}$. The pulley is mounted in a vertical plane and it is free to rotate about its axis. The 2 m mass is released from rest and its speed when it has descended through a height of 3.6 m is $\_\_\_\_$ $\mathrm{m} / \mathrm{s}$. (Assume string does not slip and $\mathrm{g}=10 \mathrm{~m} / \mathrm{s}^{2}$)
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