A person of mass 60 kg is inside a lift of mass 940 kg and presses the button one control panel. The lift starts moving upwards with an acceleration 1.0 m/s2. If g = 10 m/s2, the tension in the supporting cable is :
Answer & explanation
Correct answer: option 4
T -(m +M) g = (m +M) a
⇒ T = (M+m)(g+a) = (940+60)(10+1)
= 11000 N