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The mass of a body measured by a physical balance in a lift at rest is found to be m. If the lift is going up with an acceleration a, its mass will be measured as
-
-
m 
1 - a 
g -
m 1 + a g - m
- zero
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Correct Option: C
Mass is the quantity of matter possessed by a body. It will be the same even if the lift goes up with acceleration.
