Q.

A man weighs 80 kg He stands on a weighing scale in a lift which is moving upwards with a uniform acceleration of 5 ms−2.  What would be the reading on the scale?g=10ms−2

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a

Zero

b

400 N

c

800 N

d

1200 N

answer is D.

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Detailed Solution

Reading of weighing scale = m (g + a)= 80 (10 + 5) = 1200 N
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A man weighs 80 kg He stands on a weighing scale in a lift which is moving upwards with a uniform acceleration of 5 ms−2.  What would be the reading on the scale?g=10ms−2