Question

A light spring balance hangs from the hook of the other similar light spring balance and a block of mass M kg hangs from the former one. Then the true statement about the scale reading is

• A. Both the scale read $\frac{M}{2}$ kg wt
• B. Both the scale read M kg wt
• C. The scale of lower one reads M kg wt and of the upper one zero
• D. The reading of two scales can be anything but the sum of the reading will be M kg

Answer 1

The correct option is B Both the scale read M kg wt

As both the springs are massless, then the second spring does not affect the reading. Both the spring balance will read M kg wt.