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 = 10ms -2 , the tension in the supporting cable is :

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a

8600 N

b

9680 N

c

11000 N

d

1200 N

answer is C.

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Detailed Solution

Tension in supporting cable = (940 + 60) (10 + 1) = 11000 N
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