Pressure Flashcards
What is pressure
Pressure is how much force is put on a certain area
What is the formula for pressure
pressure = force / Area
What is Pressure measured in?
Pressure is measure in N/m² or Pascal (Pa)
1 N/m² = 1 Pa
A wooden box weighs 15N and its base has an area of 0.8 m² Calculate the pressure exerted by the box on the floor.
15 ÷ 0.8 = 18.75 N/m² or 18.75 Pa
How do you gain less/more atmosphere
The lower you the more atmosphere there is above you so pressure due to weight increases
the higher you are the less atmosphere there is above you so pressure decreases
What is the atmospheric pressure in Pa?
Over 100 000 Pa at sea level
How does pressure in liquids increase
Liquids increases in depth due to weight above the liquid
What happens when you put an object in water
It experiences water pressure from all directions
Because water pressure increases with depth force pushing upwards at the bottom of the object will get greater than force pushing down
this is called upthrust
if upthrust is equal to objects weight then object will float
If upthrust is less than object weight then it’ll sink
