Transcript File - Coach Ed Science

CHAPTER
NEW CHAPTER
Gravity, Friction, and Pressure
the BIG idea
Newton's laws apply to all forces.
Gravity, Friction, and Pressure
12.1 Gravity is a force exerted by masses.
12.2 Friction is a force that opposes motion.
12.3 Pressure depends on force and area.
12.4 Fluids can exert a force on objects.
CHAPTER OUTLINE
CHAPTER RESOURCES
12.1
CHAPTER HOME
KEY CONCEPT
Gravity is a force exerted by masses.
VOCABULARY
gravity
weight
Greater mass results in greater force.
orbit
Greater distance results in smaller force.
VISUALIZATION
Explore how objects fall
at the same rate in a
vacuum.
VISUALIZATION
See if horizontal velocity affects
acceleration by gravity.
CHAPTER
RESOURCES
SECTION
OUTLINE
12.2
CHAPTER HOME
KEY CONCEPT
Friction is a force that opposes motion.
VOCABULARY
Frictional force depends on–
friction
• types of surfaces
fluid
• motion of surfaces
air resistance
• force pressing surfaces together
friction
CHAPTER
RESOURCES
SECTION
OUTLINE
12.2
CHAPTER HOME
KEY CONCEPT
Friction is a force that opposes motion.
Air resistance is a type of friction.
VOCABULARY
friction
fluid
air resistance
air resistance
gravity
CHAPTER
RESOURCES
SECTION
OUTLINE
12.3
KEY CONCEPT
CHAPTER HOME
Pressure depends on force and area.
Force
Pressure =
Area
Pressure in a fluid acts in all directions.
VOCABULARY
pressure
pascal
CHAPTER
RESOURCES
SECTION
OUTLINE
12.3
CHAPTER HOME
KEY CONCEPT
Pressure depends on force and area.
Force
Pressure =
Area
Pressure in a fluid acts in all directions.
SIMULATION
pressure
pascal
VISUALIZATION
Explore how a fluid
produces pressure.
Watch a simple
demonstration of air
pressure.
VISUALIZATION
VISUALIZATION
See how to lift a stool
using a rubber mat and
air pressure.
VOCABULARY
See a Madgeburg swing
in action.
CHAPTER
RESOURCES
SECTION
OUTLINE
12.4
KEY CONCEPT
CHAPTER HOME
Fluids can exert a force on objects.
• Buoyant force is equal to the weight of the displaced
fluid.
VOCABULARY
buoyant force
Bernoulli's principle
Pascal’s principle
• A faster-moving fluid produces less pressure than a
slower-moving one.
• Pressure is transmitted through fluids.
CHAPTER
RESOURCES
SECTION
OUTLINE
12.4
CHAPTER HOME
KEY CONCEPT
Fluids can exert a force on objects.
VOCABULARY
VISUALIZATION
VISUALIZATION
Watch a simple demonstration
of Bernoulli’s principle.
Use Bernoulli’s principal to
throw toiletpaper.
buoyant force
Bernoulli's principle
Pascal’s principle
VISUALIZATION
Learn how to float a beachball
in the air.
CHAPTER
RESOURCES
SECTION
OUTLINE
12.1
KEY CONCEPT
CHAPTER HOME
Gravity is a force exerted by masses.
I. Gravity is a force exerted by masses.
VOCABULARY
gravity
A. Masses attract each other.
1. The Force of Gravity
weight
orbit
2. Gravity on Earth
3. Weight and Mass
B. Gravity keeps objects in orbit.
1. Spacecraft in Orbit
2. People in Orbit
CHAPTER
RESOURCES
KEY CONCEPT
SUMMARY
12.2
KEY CONCEPT
CHAPTER HOME
Friction is a force that opposes motion.
II. Friction is a force that opposes motion.
VOCABULARY
friction
A. Friction occurs when surfaces slide against
each other.
1. Forces and Surfaces
fluid
air resistance
2. Friction and Heat
B. Motion through fluids produces friction.
CHAPTER
RESOURCES
KEY CONCEPT
SUMMARY
12.3
KEY CONCEPT
CHAPTER HOME
Pressure depends on force and area.
III. Pressure depends on force and area.
A. Pressure describes how a force is spread over
an area.
VOCABULARY
pressure
pascal
B. Pressure acts in all directions in fluids.
C. Pressure in fluids depends on depth.
1. Pressure in Air
2. Pressure in Water
CHAPTER
RESOURCES
KEY CONCEPT
SUMMARY
12.4
KEY CONCEPT
CHAPTER HOME
Fluids can exert a force on objects.
IV. Fluids can exert a force on objects.
A. Fluids can exert an upward force on objects.
1. Buoyancy
VOCABULARY
buoyant force
Bernoulli's principle
Pascal’s principle
2. Density and Buoyancy
B. The motion of a fluid affects its pressure.
1. Bernoulli’s Principle
2. Applying Bernoulli’s Principle
C. Forces can be transmitted through fluids.
1. Pascal’s Principle
2. Hydraulics
CHAPTER
RESOURCES
KEY CONCEPT
SUMMARY
CHAPTER HOME
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