Which of the following factors affects lift force?
What Factors Affect Lift? The size and shape of the wing, the angle at which it meets the oncoming air, the speed at which it moves through the air, even the density of the air, all affect the amount of lift a wing creates.
Which of the following principal describes the inverse relationship between relative velocity and relative pressure?
This inverse relationship between the pressure and speed at a point in a fluid is called Bernoulli’s principle.
When the buoyant force on an object is the weight of the object The object will float?
Buoyant force is the net upward force on any object in any fluid. If the buoyant force is greater than the object’s weight, the object will rise to the surface and float. If the buoyant force is less than the object’s weight, the object will sink.
Can buoyancy act downward?
Regarding your original question, yes buoyant force can act downwards (as you have drawn in your diagram). The buoyant force is due to the liquid pushing the surface of the object. As pressure is higher at the bottom of the liquid due to gravity, usually the net buoyant force is pointing upwards.
How does velocity affect lift?
The velocity used in the lift and drag equations is the relative velocity between an object and the flow. Since the aerodynamic force depends on the square of the velocity, doubling the velocity will quadruple the lift and drag.
What increases lift?
Increasing the area will increase the lift. Increasing the altitude will decrease the lift. Increasing the airspeed will increase the lift. Increasing the camber will increase the lift.
When streamlines are spread apart What does this tell us about the fluid?
In steady flow, the fluid is in motion but the streamlines are fixed. Where streamlines crowd together, the fluid speed is relatively high; where they open out, the fluid is relatively still. See also laminar flow, turbulent flow.
Why does higher velocity creates lower pressure?
When the fluid speeds up, some of the energy from that random motion is used to move faster in the fluid’s direction of motion. This results in a lower pressure.
What affects buoyancy?
The factors that affect buoyancy are… the density of the fluid. the volume of the fluid displaced. the local acceleration due to gravity.
How does buoyant force affect whether an object floats or sinks?
If the object displaces an amount of water equal to its own weight, the buoyant force acting on it will be equal to gravity—and the object will float. But, if the object weighs more than the water it displaces, the buoyant force acting on it will be less than gravity, and it will sink.
Why do boats float?
The air that is inside a ship is much less dense than water. That’s what keeps it floating! The average density of the total volume of the ship and everything inside of it (including the air) must be less than the same volume of water.
How does volume affect buoyancy?
Buoyancy depends on volume and so an object’s buoyancy reduces if it is compressed and increases if it expands. If an object at equilibrium has a compressibility less than that of the surrounding fluid, the object’s equilibrium is stable and it remains at rest.