Q: 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/s2. If g = 10 ms–2 , the tension in the supporting cable is
(a) 1200 N
(b) 8600 N
(c) 9680 N
(d) 11000 N
Click to See Answer :
Ans: (d)
Sol: T = m(g+a)
T = 1000(10+1)
T= 11000 N