JEE Main & Advanced
Physics
NLM, Friction, Circular Motion
Question Bank
Self Evaluation Test - Laws of Motion
question_answer
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\[1.0\text{ }m/{{s}^{2}}\]. If \[g=\text{ }10\text{ }m{{s}^{-2}}\], the tension in the supporting cable is
A)8600 N
B)9680 N
C)11000 N
D)1200 N
Correct Answer:
C
Solution :
[c] Total mass\[=(60+940)kg=1000\text{ }kg\] Let T be the tension in the supporting cable, Then \[T-1000g=1000\times 1\] \[\Rightarrow T=1000\times 11=11000\text{ N}\]