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

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

A

`4ms^(-2)` upwards

B

`4ms^(-2)` downwards

C

`14ms^(-2)` upwards

D

`30ms^(-2)` downwards

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