Pressure & Moments
What is the formula for pressure?
pressure = force รท area
What is the unit of pressure?
-Pascal
-Newton per square meter
What is a pivot?
-To pivot is to turn or rotate
-the one central thing that something depends upon.
What it moment?
A turning force
What are moments measured in?
-newton centimetres (N cm)
-newton metres (N m)
True or false:
Pressure depends on depth
True
When you go underwater do your lungs get bigger or smaller?
Smaller
What is one pascal equivalent to?
1 N/m2
How can we increase pressure?
Reducing surface area
How can we decrease pressure?
Reducing force
Where is the pressure greatest in a liquid?
At the bottom
Will air pressure be higher on top of a mountain or at the bottom of the mountain?
-bottom
What is the principle of moment?
The total clockwise moment about a point equals the total anti-clockwise moment about the same point.
give an example of a large area giving a small pressure.
-Camel on sand
-Snow shoes.
What is atmospheric pressure?
The pressure exerted by air that is present in the atmosphere is atmospheric pressure.