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Gravity, Friction, and Pressure the BIG idea Newton's laws apply to all forces. Gravity, Friction, and Pressure Gravity is a force exerted by masses. 3.1.

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Presentation on theme: "Gravity, Friction, and Pressure the BIG idea Newton's laws apply to all forces. Gravity, Friction, and Pressure Gravity is a force exerted by masses. 3.1."— Presentation transcript:

1 Gravity, Friction, and Pressure the BIG idea Newton's laws apply to all forces. Gravity, Friction, and Pressure Gravity is a force exerted by masses. 3.1 Friction is a force that opposes motion. 3.2 Pressure depends on force and area. 3.3 Fluids can exert a force on objects. 3.4 CHAPTER CHAPTER OUTLINE NEW CHAPTER

2 VOCABULARY KEY CONCEPT CHAPTER HOME 3.1 SECTION OUTLINE SECTION OUTLINE weight orbit gravity Gravity is a force exerted by masses. Greater mass results in greater force. Greater distance results in smaller force.

3 VOCABULARY KEY CONCEPT CHAPTER HOME The force that objects exert on each other because of their mass. gravity 3.1 KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY Gravity is a force exerted by masses. weight orbit gravity

4 VOCABULARY KEY CONCEPT CHAPTER HOME The force of gravity on an object. weight 3.1 KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY weight orbit gravity Gravity is a force exerted by masses.

5 VOCABULARY KEY CONCEPT CHAPTER HOME The elliptical path one celestial body follows around another celestial body; an object in orbit has a centripetal force acting on it that keeps the object moving in a circle or other ellipse. orbit 3.1 KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY weight orbit gravity Gravity is a force exerted by masses.

6 VOCABULARY KEY CONCEPT CHAPTER HOME Friction is a force that opposes motion. 3.2 SECTION OUTLINE SECTION OUTLINE Frictional force depends on– fluid air resistance friction types of surfaces motion of surfaces force pressing surfaces together friction

7 VOCABULARY KEY CONCEPT CHAPTER HOME Friction is a force that opposes motion. 3.2 SECTION OUTLINE SECTION OUTLINE fluid air resistance friction Air resistance is a type of friction. air resistance gravity

8 VOCABULARY KEY CONCEPT CHAPTER HOME A force that resists the motion between two surfaces in contact. friction 3.2 KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY Friction is a force that opposes motion. fluid air resistance friction

9 VOCABULARY KEY CONCEPT CHAPTER HOME A substance that can flow easily, such as a gas or a liquid. fluid 3.2 KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY Friction is a force that opposes motion. fluid air resistance friction

10 VOCABULARY KEY CONCEPT CHAPTER HOME The fluid friction due to air. air resistance 3.2 KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY Friction is a force that opposes motion. fluid air resistance friction

11 VOCABULARY KEY CONCEPT CHAPTER HOME 3.3 SECTION OUTLINE SECTION OUTLINE Pressure depends on force and area. pascal pressure Pressure = Force Area Pressure in a fluid acts in all directions.

12 VOCABULARY KEY CONCEPT CHAPTER HOME A measure of how much force is acting on a certain area; how concentrated a force is. pressure 3.3 KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY pascal pressure Pressure depends on force and area.

13 VOCABULARY KEY CONCEPT CHAPTER HOME The unit used to measure pressure; one pascal is the pressure exerted by one newton of force on an area of one square meter, or one N/m 2. pascal 3.3 KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY pascal pressure Pressure depends on force and area.

14 VOCABULARY KEY CONCEPT CHAPTER HOME Fluids can exert a force on objects. 3.4 SECTION OUTLINE SECTION OUTLINE Buoyant force is equal to the weight of the displaced fluid. A faster-moving fluid produces less pressure than a slower-moving one. Pressure is transmitted through fluids. Bernoulli's principle buoyant force Pascal’s principle

15 VOCABULARY KEY CONCEPT CHAPTER HOME The upward force on objects in a fluid; often called buoyancy. buoyant force 3.4 KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY Bernoulli's principle buoyant force Pascal’s principle Fluids can exert a force on objects.

16 VOCABULARY KEY CONCEPT CHAPTER HOME A statement that describes the effects of movement on fluid pressure; according to this principle, an increase in the speed of the motion of a fluid decreases the pressure within the fluid. Bernoulli's principle 3.4 KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY Fluids can exert a force on objects. Bernoulli's principle buoyant force Pascal’s principle

17 VOCABULARY KEY CONCEPT CHAPTER HOME A statement that says when an outside pressure is applied at any point to a fluid in a container, that pressure is transmitted throughout the fluid with equal strength. Pascal’s principle 3.4 KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY Fluids can exert a force on objects. Bernoulli's principle buoyant force Pascal’s principle

18 VOCABULARY KEY CONCEPT CHAPTER HOME 1. The Force of Gravity I. Gravity is a force exerted by masses. A. Masses attract each other. B. Gravity keeps objects in orbit. 2. Gravity on Earth 2. People in Orbit 3.1 KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY 1. Spacecraft in Orbit weight orbit gravity Gravity is a force exerted by masses. 3. Weight and Mass

19 VOCABULARY KEY CONCEPT CHAPTER HOME II. Friction is a force that opposes motion. A. Friction occurs when surfaces slide against each other. B. Motion through fluids produces friction. 3.2 KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY 1. Forces and Surfaces 2. Friction and Heat fluid air resistance friction Friction is a force that opposes motion.

20 VOCABULARY KEY CONCEPT CHAPTER HOME III. Pressure depends on force and area. A. Pressure describes how a force is spread over an area. B. Pressure acts in all directions in fluids. C. Pressure in fluids depends on depth. 1. Pressure in Air 2. Pressure in Water 3.3 KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY pascal pressure Pressure depends on force and area.

21 VOCABULARY KEY CONCEPT CHAPTER HOME IV. Fluids can exert a force on objects. 1. Buoyancy 2. Density and Buoyancy B. The motion of a fluid affects its pressure. C. Forces can be transmitted through fluids. 3.4 KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY A. Fluids can exert an upward force on objects. Fluids can exert a force on objects. 1. Bernoulli’s Principle 2. Applying Bernoulli’s Principle 1. Pascal’s Principle 2. Hydraulics Bernoulli's principle buoyant force Pascal’s principle


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