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Q.

The mass of a lift is 2000 kg. When the tension in the supporting cable is 28000 N, then its acceleration is $(g = 10 m s^{- 2})$

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a

$30 m s^{- 2}$ downwards

b

$4 m s^{- 2}$ upwards

c

$4 m s^{- 2}$ downwards

d

$14 m s^{- 2}$ upwards

answer is A.

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Detailed Solution

$T = m (g + a)$

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