A 60 kg person is weighed by a balance as 54 kg in a lift which is accelerated downwards. The acceleration of the lift is

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1.26 ms-2

1.76 ms-2

1.98 ms-2

0.98 ms-2

answer is D.

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Detailed Solution

Here, Meff g=M(g-a)or gg-a=MMeff ⇒gg-a=6054⇒ gg-a=109 ⇒ 9g=10g-10a⇒ -g=-10a ⇒ g=10a⇒ a=g10 ⇒ a=9.810=0.98 ms-2

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