The force of buoyancy is an upward force exerted by a fluid that opposes the weight of an immersed object. It is caused by the pressure difference between the top and bottom of the object. This force always acts vertically upwards, regardless of whether the object is floating or sinking.
The force of buoyancy on an object floating on water is F, while it is S on an object that sinks in water. The weight of both the objects is W. Which one of the following is always true?
Asked in UPSC Geoscientist 2023 · Topic: Mechanics (Fluid Statics and Dynamics (Continuity Equation, Bernoulli's Theorem))
More Physics questions
- By dropping a sphere of 30 cm radius into a cylindrical vessel of 80 cm diameter which is partly filled with water, its water level rises by x cm. Then what would be value of x?
- A boat running upstream takes 6 hours 30 minutes to cover a certain distance, while it takes 3 hours to cover the same distance running downstream. What is the ratio between the speed of the boat and speed of the water current, respectively?
- Water is flowing at the rate of 12 km per hour through a pipe of diameter 14 cm into a rectangular tank which is 60 m long and 33 m wide. Find the time in which the level of water in the tank will rise by 28 cm.
- An object weighs maximum in
- Consider the following statements : Statement-I: Assertion (A) : The stream of water flowing at high speed from a garden hose pipe tends to spread like a fountain when held vertically up, but tends to narrow down when held vertically down. Statement-II: Reason (R) : In any steady flow of an incompressible fluid, the volume flow rate of the fluid remains constant. Choose the correct answer from the options given below :
- $\frac{p}{\rho} + hg + \frac{1}{2} = \text{constant}$ is the mathematical statement of ___.
- A deep sea diver may hurt his ear drum during diving because of
- A container is first filled with water and then the entire water is replaced by mercury. Mercury has a density of 13·6 × 10³ kg/m³. If X is the weight of the water and Y is the weight of the mercury, then