Q. A person is measuring his weight by standing on a weighing machine inside a lift. When the lift is at rest, the machine shows his weight to be $55\ kg$. In between the floor when the lift is moving up with a constant speed of $10\ km/hr$, he again measures his weight, which is
A) $55\ kg$
B) $65\ kg$
C) $50\ kg$
D) $45\ kg$
Explanation
(a) Since acceleration of lift is zero
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.