Question

A person of mass `60kg` is inside a lift of mass `940kg` and presses the button on control panel. The lift starts moving upword with an acceleration `1.0m//s^(2)` . If `g=10m//s^(2)` , the tension in the supporting cable is.
A. `9680N`
B. `11000N`
C. `1200N`
D. `8600N`

Answer 1

Correct Answer - C
Total mass=Mass of lift+Mass of person
`=940+60=1000kg`
`T-mg=ma`
Hence, `T-1000xx10=1000xx1`
`T=11000N` .