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Questions  

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

a
Zero
b
400 N
c
800 N
d
1200 N

detailed solution

Correct option is D

Reading of weighing scale = m (g + a)=80(10+5)=1200N

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