Pressure

Think, Pair, Share

Which would hurt more, a woman stepping on your toes with the heel of her high heeled shoes, or an elephant stepping on your toes?

Definitions

Fluid

Pressure

PressurePressure = Force / Area

If force is in Newtons and area in m2, then the answer is in Pascals

A

FP

Fluid Pressure

Fluid pressure is exerted in all directions.

How does pressure change with depth or altitude?

Mt. Everest

SCUBA Diving

Pressure and Gravity

Due to the force of gravity, the pressure of any fluid varies with depth.

Ears PopThe “Bends”

Pressure on a Diver

The weight of the Air

Atmospheric Pressure =•14.7 psi

•10.13 N/cm2

•101 kPa

•1018 millibars

Differences in Pressure

Fluids move from high to low pressure.

Vacuum cleaners StrawsBreathing

Weather systems