Hydrostatic Pressure. Communicating Vessels. Pascal's Principle. Hydraulic Press

LEARNING OBJECTIVES:
1. Describe hydrostatic pressure and recall, rearrange and use the

DENSITY
The mass density of a substance is the mass of a

Example - Blood as a Fraction of
Body Weight
The body of

(a)
(b)

SI Unit
of Pressure:
1 N/m2 = 1 Pa

Pascal

Example: The Force
on a Swimmer
Suppose the pressure
acting on the

Since the water pushes perpendicularly
against the back of the hand,

Atmospheric Pressure at Sea Level:
1.013x105 Pa = 1 atmosphere

Why do tetra packs crush or squeeze itself when you sip

Hydrostatic
Pressure

PRESSURE AND DEPTH IN A STATIC FLUID

Hydrostatic
Pressure

PRESSURE AND DEPTH IN A STATIC FLUID

Conceptual Example - The Hoover Dam
Lake Mead is the largest wholly

Answer:
The force exerted on a given section of the dam depends

Example - The Swimming Hole
Points A and B are located a

PRESSURE AND DEPTH IN A STATIC FLUID

Hydrostatic Pressure

Pressure Gauges

PRESSURE GAUGES

11.4 PRESSURE GAUGES

absolute pressure

PRESSURE GAUGES

PASCAL’S PRINCIPLE

Any change in the pressure applied
to a completely enclosed

PASCAL’S PRINCIPLE

PASCAL’S PRINCIPLE

Example - A Car Lift
The input piston has a radius

PASCAL’S PRINCIPLE

Communicating Vessel

set of containers containing a homogeneous fluid: when the liquid