question_answer

A light spring balance hangs from the hook of the other light spring balance and a block of mass M kilogram hangs from the former one. Which of the following statements about the scale reading is true?

A)  Both the scales read \[M/2\] kilogram each.

B)  Both the scales read \[M\] kilogram each.

C)  The scale of the lower one reads \[M\] kilogram and of the upper one zero.

D)  The reading of the two scales can be anything but the sum of the reading will be \[M\] kilogram.

Correct Answer: B

Solution :

[b] The springs are connected in series and the spring balance are massless therefore both the scales read M kg each.