3 Principles of Pressure
If you increase the pressure at one point in a fluid it will increase the same everywhere in that fluid was discovered by who?
Pascal
If an object weighs 10 N and has an area of 2m2 what is the pressure it exerts on the ground?
5 Pa
What is the definition if pressure?
The amount of force exerted per area.
What force is produced by wing explained by Bernoulli's Principle
Lift
What object did Bernoulli's Principle help invent
Wing
Pressure also goes up
If you swim deeper in a pool what happens to the pressure on you?
The pressure increases
Why does pressure cause a hydraulic press to work
Pressure increases equally through an entire fluid
What is a buoyant force
The upward force in a fluid that pushes up against the weight of an object
If the area of an object goes down what happens to the pressure
The pressure goes up
If you climb higher on a mountain what happens to the pressure on you
The pressure of the air would go down
How does a wing work?
The air on top is faster than the air on the bottom creating lift
What is Archimedes Principle
The buoyant force on an object is equal to the weight of the liquid displaced by the object.
Pressure is inversely related to area, but directly related to force
As you fill up a pool what happens to the pressure at the bottom of the pool
It increases
How does a hydraulic press multiply force
By changing the size of the pistons. In general the bigger the second piston gets the bigger the force will get.
Why does a block of steel sink, but a sheet of steel in the correct shape float?
As long as the steel can displace more water than the steel itself weighs it will float.
If the force pushing on a hydraulic press is 10N and the area is 2m2 how much pressure would be put out by the press if the second piston's area was 4m2?
20N
Why do we build machines to use hydraulic presses
Hydraulic presses multiply the output force
How do we weigh ships in water?
By looking at how much the water goes up the side of the ship. They can then calculate the water displaced which equals the weight of the ship