The mass of a body indicated by a weighing machine in a lift at rest is found to be m. If the lift is going down with an acceleration a, then the new reading shown by the scale will be (considera<g)
A
m(1−ag)
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B
m(1+ag)
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C
m
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D
Zero
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Solution
The correct option is Am(1−ag) Here it is given that, lift is moving up
Net Normal reaction is