Q.
A vessel with water is placed on a weighing pan and it reads $0.8\ gcc^{- 1}$ is sunk into the water with a pin of negligible volume as shown in figure keeping it sunk. The weighing pan will show a reading
A) 600 g
B) 632 g
C) 642 g
D) 640 g
Explanation
(d) The upward thrust ($ie$ buoyancy force) acts on the body and an equal and opposite force acts on the water so the weight will be the sum of the two $= 600 + 40 = 640\ g$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.