Question

If in the lift, the body of mass $5kg$ is suspended to spring balance, the lift moves downward with acceleration $10m/s^2,$ then the reading of spring balance is

• A. more than 5 kg-wt
• B. less than 5 kg-wt
• C. 5 kg-wt
• D. zero

Answer 1

Answer: (D)

$F=m(g-a)$ $=5(10-10)=0$