Question
A person of mass 62 kg is inside of 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 m/s2 ,the tension in the supporting cable is
-
9680 N
-
11000 N
-
1200 N
-
8600 N
Solution
B.
11000 N
Total mass = Mass of lift + Mass of person
= 940 +60 = 1000 kg
T - mg = ma
Hence, T - 1000 x 10 = 1000 x 1
T = 11000 N
T - mg = ma
Hence, T - 1000 x 10 = 1000 x 1
T = 11000 N
