Q.
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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a
400 N
b
800 N
c
1200 N
d
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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