Engineering Board Exam Reviewer · Fluid Mechanics · medium
A body completely submerged in a fluid is in stable equilibrium if its center of gravity is:
- Above its center of buoyancy
- Below its center of buoyancy
- At its metacenter
- Above its metacenter
Answer
B. Below its center of buoyancy
Solution
For fully submerged bodies (e.g., submarines, balloons), the metacenter coincides with B; stability requires G below B.
More Fluid Mechanics questions
- The maximum theoretical height to which water can be raised by suction at sea level is about:
- The pressure at the summit of a siphon is:
- In a horizontal pipe of decreasing cross-section, as the fluid velocity increases, the pressure:
- For the same flow rate and friction factor, halving the pipe diameter increases the friction head loss by a factor of:
- When the diameter of a pipe is halved for the same flow rate, the velocity becomes:
- Using Stokes' law, what is the terminal settling velocity of a sand particle 0.1 mm in diameter ( = 2650 kg/m3) in water ( = 1000 kg/m3, =…
- A 1:25 scale model of a spillway is built using Froude similarity. If the model discharge is 0.02 m3/s, what is the corresponding…
- A 1:25 scale model of a spillway is tested using Froude similarity. If the prototype velocity is 10 m/s, what should the model velocity be?
- A car experiences 305.6 N of aerodynamic drag at 100 km/h. How much power is needed to overcome this drag?
- A car with a drag coefficient of 0.3 and frontal area of 2.2 m2 travels at 100 km/h in air ( = 1.2 kg/m3). What is the aerodynamic drag…