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A block of mass 5kg is suspended by mean...

A block of mass 5kg is suspended by means of a uniform cord of mass 2kg attached to the roof of a lift as shown. If the lift starts accelerating up with a = `5ms^(-2)` (and `g = 10ms^(-2)`). The tension at the mid-point of the cord is

A

90 N

B

100 N

C

40 N

D

50 N

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The correct Answer is:
A
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