Question

A person of mass $60\,kg$ is inside a lift of mass $940\,kg$ and presses the button on control panel. The lift starts moving upwards with an acceleration $1.0 \,m/s^2$. If $g = 10\, ms^{-2}$, the tension in the supporting cable is

• A. 8600 N
• B. 9680 N
• C. 11000 N
• D. 1200 N

Answer 1

Answer: (C)

11000 N

Answer 2

For $($ man $+$ lift $)$
$T-(60+940) \,g =(60+940) \times 1$
$T=(60+940)(10+1)=11000\, N$