Q. 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
A) $m\left( 1 - \frac{a}{g} \right)$
B) $m\left( 1 + \frac{a}{g} \right)$
C) $m$
D) Zero
Explanation
(c) Mass measured by physical balance remains unaffected due to variation in acceleration due to gravity
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.