Concepts Of Physics MCQ Edition [Volume 1]PhysicsFluid Mechanics
A solid is fully immersed in a liquid. The force exerted by the liquid on the solid will
Options
- Achange if its orientation is modified
- Bact in the vertically upward direction
- Cincrease if the solid is pushed deeper into the liquid
- Ddecrease if it is partially withdrawn from the liquid
Correct answer
D. decrease if it is partially withdrawn from the liquid
Step-by-step solution
The net force exerted by a liquid on a solid immersed in it is the buoyant force. According to Archimedes' principle, the buoyant force acts in the vertically upward direction and its magnitude is equal to the weight of the liquid displaced by the solid. F_ B = V_ i g where is the density of the liquid, V_ i is the immersed volume of the solid, and g is the acceleration due to gravity. Since the buoyant force depends only on the immersed volume and the density of the liquid, it does not change if the orientation of