Question

A weight is suspended from the ceiling of a lift by a spring balance. When the lift is stationary the spring balance reads W. If the lift suddenly falls freely under gravity, the reading on the spring balance will be

• A. W
• B. 2 W
• C. $\frac{W}{2}$
• D. \N

Answer 1

The correct option is D \N

Reading of spring balance $R=m(g-a)$
If the lift falls freely then a = g $\therefore$ R=0