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  • 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, t

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:

Option: 1

1200 N


Option: 2

8600 N


Option: 3

9680 N


Option: 4

11000 N


Answers (1)

best_answer

                                             
\\ \text{Here, Mass of a person, } \ m =60 kg ,$ Mass of lift, $M =940 kg ,$ \\ $a=1 m / s ^{2}, g=10 m / s ^{2}$ \\ Let $T$ be the tension in the supporting cable. \ \\ $\therefore \quad T-(M+m) g=(M+m) a$ \\ $T=(M+m)(a+g)$ \\ $=(940+60)(1+10)$ \\ $=11000 N$

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seema garhwal

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