Q. A body floats in a liquid contained in a beaker. If the whole system as shown in figure falls freely under gravity, then the upthrust on the body due to liquid is
A) Zero
B) Equal to the weight of liquid displaced
C) Equal to the weight of the body in air
D) None of these
Explanation
(a) Upthrust on the body $= v\sigma g$. For freely falling body effective $g$ becomes zero. So up thrust becomes zero
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.