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A lift weighing 1000 kg is moving upwards with an acceleration of 1 m/s². The tension in the supporting cable is

1. 980N
2. 10800N
3. 9800N
4. 8800N

Correct answer: 10800N

Solution

The tension in the cable is given by T = m(g + a), where m = 1000 kg, g = 9.8 m/s², and a = 1 m/s². Substituting, T = 1000(9.8 + 1) = 1000 × 10.8 = 10800 N.

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