Q.

If the elevator in the shown figure is moving upwards with constant acceleration 1 ms-2, the tension in the string connected to block A of mass 6kg would be         (Take, g = 10 ms-2)

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a

60 N

b

66 N

c

54 N

d

42 N

answer is B.

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Detailed Solution

The tension T in the string is  T=6(g+a)=6(10+1)=66 N
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If the elevator in the shown figure is moving upwards with constant acceleration 1 ms-2, the tension in the string connected to block A of mass 6kg would be         (Take, g = 10 ms-2)