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The mass of a lift is 2000kg. When the tension in the supporting cable is 28000N, then its acceleration is

The mass of a lift is 2000kg. When the tension in the supporting cable is 28000N, then its acceleration is

Options

(a) 4ms⁻² upwards
(b) 4 ms⁻² downwards
(c) 14 ms⁻² upwards
(d) 30 ms⁻² downwards

Correct Answer:

4ms⁻² upwards

Explanation:

Net force, F = T – mg
ma = T – mg
2000a = 28000 – 20000 = 8000
a = 8000 / 2000 = 4 ms⁻² upwards

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