#### 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 : Option 1) both the scales read  M Kg each Option 2) the scale of the lower one reads M kg  and of the upper one zero Option 3) the reading of the two scales can be anything  but the sum of the reading will be M kg  Option 4) both the scales read M/2 kg

As we learnt in

Equilibrium of Concurrent Forces -

If all the forces working on a body are acting on the same point then they are said to be concurrent.

- wherein

Three forces will be in equilibrium if they are represented by three sides of triangle taken in order

Both the scales read  M Kg each.

Correct option is 1.

Option 1)

both the scales read  M Kg each

This is the correct option.

Option 2)

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

This is an incorrect option.

Option 3)

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

This is an incorrect option.

Option 4)

both the scales read M/2 kg

This is an incorrect option.