A man weighs 80kg. He stands on a weighing scale in a lift which is moving upwards with a uniform acceleration of 5m/s2.What would be the reading on the scale.(g=10m/s2)

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400 N

800 N

1200 N

Zero

answer is C.

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Detailed Solution

For accelerated upward motionR=m(g+a)=80(10+5)=1200N

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