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Q.

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

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a

Both the scales read M/2 kg each

b

Both the scales read M kg each

c

The scale of the lower one reads M kg and of the upper one zero

d

The reading of the two scales can be anything but the sum of the reading will be M kg

answer is B.

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Detailed Solution

As the spring balance are massless therefore both the scales read M kg each.
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