5. the laws of motion 5.1 the concept of force5.2 newton’s first law and inertial frames5.3...

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5 . The Laws of Motion

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Page 1: 5. The Laws of Motion 5.1 The Concept of Force5.2 Newton’s First Law and Inertial Frames5.3 Mass5.4 Newton’s Second Law5.5 The Force of Gravity and Weight5.6

5 .The Laws of Motion

Page 2: 5. The Laws of Motion 5.1 The Concept of Force5.2 Newton’s First Law and Inertial Frames5.3 Mass5.4 Newton’s Second Law5.5 The Force of Gravity and Weight5.6

The Laws of Motion

Page 3: 5. The Laws of Motion 5.1 The Concept of Force5.2 Newton’s First Law and Inertial Frames5.3 Mass5.4 Newton’s Second Law5.5 The Force of Gravity and Weight5.6

5.1 The Concept of Force

Page 4: 5. The Laws of Motion 5.1 The Concept of Force5.2 Newton’s First Law and Inertial Frames5.3 Mass5.4 Newton’s Second Law5.5 The Force of Gravity and Weight5.6

Page 5: 5. The Laws of Motion 5.1 The Concept of Force5.2 Newton’s First Law and Inertial Frames5.3 Mass5.4 Newton’s Second Law5.5 The Force of Gravity and Weight5.6

The only known fundamental forces in nature are all field forces:

Page 6: 5. The Laws of Motion 5.1 The Concept of Force5.2 Newton’s First Law and Inertial Frames5.3 Mass5.4 Newton’s Second Law5.5 The Force of Gravity and Weight5.6

Measuring the Strength of a Force

Because forces are vector quantities, you must use the rules of vector addition to obtain the net force acting on an object.

Page 7: 5. The Laws of Motion 5.1 The Concept of Force5.2 Newton’s First Law and Inertial Frames5.3 Mass5.4 Newton’s Second Law5.5 The Force of Gravity and Weight5.6

5.2 Newton’s First Law and Inertial Frames

Page 8: 5. The Laws of Motion 5.1 The Concept of Force5.2 Newton’s First Law and Inertial Frames5.3 Mass5.4 Newton’s Second Law5.5 The Force of Gravity and Weight5.6

Page 9: 5. The Laws of Motion 5.1 The Concept of Force5.2 Newton’s First Law and Inertial Frames5.3 Mass5.4 Newton’s Second Law5.5 The Force of Gravity and Weight5.6

Page 10: 5. The Laws of Motion 5.1 The Concept of Force5.2 Newton’s First Law and Inertial Frames5.3 Mass5.4 Newton’s Second Law5.5 The Force of Gravity and Weight5.6

Inertial Frames

Page 11: 5. The Laws of Motion 5.1 The Concept of Force5.2 Newton’s First Law and Inertial Frames5.3 Mass5.4 Newton’s Second Law5.5 The Force of Gravity and Weight5.6

5.3 Mass

Page 12: 5. The Laws of Motion 5.1 The Concept of Force5.2 Newton’s First Law and Inertial Frames5.3 Mass5.4 Newton’s Second Law5.5 The Force of Gravity and Weight5.6

Page 13: 5. The Laws of Motion 5.1 The Concept of Force5.2 Newton’s First Law and Inertial Frames5.3 Mass5.4 Newton’s Second Law5.5 The Force of Gravity and Weight5.6

5.4 Newton’s Second Law

Page 14: 5. The Laws of Motion 5.1 The Concept of Force5.2 Newton’s First Law and Inertial Frames5.3 Mass5.4 Newton’s Second Law5.5 The Force of Gravity and Weight5.6

Unit of Force

Page 15: 5. The Laws of Motion 5.1 The Concept of Force5.2 Newton’s First Law and Inertial Frames5.3 Mass5.4 Newton’s Second Law5.5 The Force of Gravity and Weight5.6

5.5 The Force of Gravity and Weight

Page 16: 5. The Laws of Motion 5.1 The Concept of Force5.2 Newton’s First Law and Inertial Frames5.3 Mass5.4 Newton’s Second Law5.5 The Force of Gravity and Weight5.6

Page 17: 5. The Laws of Motion 5.1 The Concept of Force5.2 Newton’s First Law and Inertial Frames5.3 Mass5.4 Newton’s Second Law5.5 The Force of Gravity and Weight5.6

5.6 Newton’s Third Law

Page 18: 5. The Laws of Motion 5.1 The Concept of Force5.2 Newton’s First Law and Inertial Frames5.3 Mass5.4 Newton’s Second Law5.5 The Force of Gravity and Weight5.6

Newton’s Third Law

Page 19: 5. The Laws of Motion 5.1 The Concept of Force5.2 Newton’s First Law and Inertial Frames5.3 Mass5.4 Newton’s Second Law5.5 The Force of Gravity and Weight5.6

Definition of normal force

Page 20: 5. The Laws of Motion 5.1 The Concept of Force5.2 Newton’s First Law and Inertial Frames5.3 Mass5.4 Newton’s Second Law5.5 The Force of Gravity and Weight5.6

5.7 Some Applications of Newton’s Laws

Page 21: 5. The Laws of Motion 5.1 The Concept of Force5.2 Newton’s First Law and Inertial Frames5.3 Mass5.4 Newton’s Second Law5.5 The Force of Gravity and Weight5.6

Tension

Page 22: 5. The Laws of Motion 5.1 The Concept of Force5.2 Newton’s First Law and Inertial Frames5.3 Mass5.4 Newton’s Second Law5.5 The Force of Gravity and Weight5.6

free-body diagram

Page 23: 5. The Laws of Motion 5.1 The Concept of Force5.2 Newton’s First Law and Inertial Frames5.3 Mass5.4 Newton’s Second Law5.5 The Force of Gravity and Weight5.6

Page 24: 5. The Laws of Motion 5.1 The Concept of Force5.2 Newton’s First Law and Inertial Frames5.3 Mass5.4 Newton’s Second Law5.5 The Force of Gravity and Weight5.6

Page 25: 5. The Laws of Motion 5.1 The Concept of Force5.2 Newton’s First Law and Inertial Frames5.3 Mass5.4 Newton’s Second Law5.5 The Force of Gravity and Weight5.6

Page 26: 5. The Laws of Motion 5.1 The Concept of Force5.2 Newton’s First Law and Inertial Frames5.3 Mass5.4 Newton’s Second Law5.5 The Force of Gravity and Weight5.6

EXAMPLE : A Traffic Light at Rest

Page 27: 5. The Laws of Motion 5.1 The Concept of Force5.2 Newton’s First Law and Inertial Frames5.3 Mass5.4 Newton’s Second Law5.5 The Force of Gravity and Weight5.6

Solution

Page 28: 5. The Laws of Motion 5.1 The Concept of Force5.2 Newton’s First Law and Inertial Frames5.3 Mass5.4 Newton’s Second Law5.5 The Force of Gravity and Weight5.6

Solution

Page 29: 5. The Laws of Motion 5.1 The Concept of Force5.2 Newton’s First Law and Inertial Frames5.3 Mass5.4 Newton’s Second Law5.5 The Force of Gravity and Weight5.6

EXAMPLE : Atwood’s MachineDetermine the magnitude of the acceleration of the two objects

and the tension in the lightweight cord.

Page 30: 5. The Laws of Motion 5.1 The Concept of Force5.2 Newton’s First Law and Inertial Frames5.3 Mass5.4 Newton’s Second Law5.5 The Force of Gravity and Weight5.6

Solution

Page 31: 5. The Laws of Motion 5.1 The Concept of Force5.2 Newton’s First Law and Inertial Frames5.3 Mass5.4 Newton’s Second Law5.5 The Force of Gravity and Weight5.6

Solution

Page 32: 5. The Laws of Motion 5.1 The Concept of Force5.2 Newton’s First Law and Inertial Frames5.3 Mass5.4 Newton’s Second Law5.5 The Force of Gravity and Weight5.6

EXAMPLE : One Block Pushes Another

Page 33: 5. The Laws of Motion 5.1 The Concept of Force5.2 Newton’s First Law and Inertial Frames5.3 Mass5.4 Newton’s Second Law5.5 The Force of Gravity and Weight5.6

Solution

Page 34: 5. The Laws of Motion 5.1 The Concept of Force5.2 Newton’s First Law and Inertial Frames5.3 Mass5.4 Newton’s Second Law5.5 The Force of Gravity and Weight5.6

5.8 Forces of Friction

Page 35: 5. The Laws of Motion 5.1 The Concept of Force5.2 Newton’s First Law and Inertial Frames5.3 Mass5.4 Newton’s Second Law5.5 The Force of Gravity and Weight5.6

5.8 Forces of Friction

Force of static friction Force of kinetic friction

Page 36: 5. The Laws of Motion 5.1 The Concept of Force5.2 Newton’s First Law and Inertial Frames5.3 Mass5.4 Newton’s Second Law5.5 The Force of Gravity and Weight5.6

5.8 Forces of Friction

Page 37: 5. The Laws of Motion 5.1 The Concept of Force5.2 Newton’s First Law and Inertial Frames5.3 Mass5.4 Newton’s Second Law5.5 The Force of Gravity and Weight5.6

Page 38: 5. The Laws of Motion 5.1 The Concept of Force5.2 Newton’s First Law and Inertial Frames5.3 Mass5.4 Newton’s Second Law5.5 The Force of Gravity and Weight5.6

EXAMPLE : Acceleration of Two Connected Objects When Friction Is Present

Page 39: 5. The Laws of Motion 5.1 The Concept of Force5.2 Newton’s First Law and Inertial Frames5.3 Mass5.4 Newton’s Second Law5.5 The Force of Gravity and Weight5.6

Solution

Page 40: 5. The Laws of Motion 5.1 The Concept of Force5.2 Newton’s First Law and Inertial Frames5.3 Mass5.4 Newton’s Second Law5.5 The Force of Gravity and Weight5.6

Page 41: 5. The Laws of Motion 5.1 The Concept of Force5.2 Newton’s First Law and Inertial Frames5.3 Mass5.4 Newton’s Second Law5.5 The Force of Gravity and Weight5.6

APPLICATION: Automobile Antilock Braking Systems (ABS)

Page 42: 5. The Laws of Motion 5.1 The Concept of Force5.2 Newton’s First Law and Inertial Frames5.3 Mass5.4 Newton’s Second Law5.5 The Force of Gravity and Weight5.6

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