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The mass of a lift is 2000 kg. When the ...

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

A

`4ms^(-2)` upwards

B

`4ms^(-2)` downwards

C

`14ms^(-2)` upwards

D

`30ms^(-2)` downwards

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