The mass of 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, it's mass will be measured as?
Answers
Mass measured by physical balance remains unaffected due to variation in acceleration due to gravity.
Option c m is the right answer
The mass of body is m, if lift is going up with an acceleration a. but the weight becomes m(g + a).
The mass of 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, we have to find the mass of body will be..
- Mass is intrinsic quantity, It can be change by changing frame of reference. It means, It doesn't depend on the acceleration of body.
- But Weight is the product of mass and acceleration so, Weight can be changed by changing acceleration of frame of reference.
Here, mass of body remains constant if lift is going up with an acceleration but the weight body changes and it is equal to m(g + a) [because a pseudo force ma acting just opposite to its motion. ]
Therefore the mass of body is m, if lift is going up with an acceleration a. but the weight becomes m(g + a).
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