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Questions  

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

a
14 ms-2,upwards
b
30 ms-2 downwards
c
4 ms-2 upwards
d
4 ms-2 downwards

detailed solution

Correct option is C

T - mg = ma= 28000 - 20000 = 2000 a= a = 4m/s2

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