force newton’s laws 1 first law - inertia second law – force and acceleration third law –...

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Force Newton’s Laws 1 First Law - Inertia Second Law – Force and Acceleration Third Law – Action and Reaction Introduction

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Page 1: Force Newton’s Laws 1 First Law - Inertia Second Law – Force and Acceleration Third Law – Action and Reaction Introduction

ForceNewton’s Laws

1

First Law - Inertia

Second Law – Force and Acceleration

Third Law – Action and Reaction

Introduction

Page 2: Force Newton’s Laws 1 First Law - Inertia Second Law – Force and Acceleration Third Law – Action and Reaction Introduction

ForceNewton’s Laws

2

Newton’s three laws of motion are…

Law #1

Law #2

Law #3

A body at rest will stay at rest unless acted upon by an external agent and a body in motion will remain

with the same motion, in a straight line, unless acted upon by an external agent.

The force acting on a body is equal to the product of its mass times its acceleration,

Each action has an equal an opposite reaction.

amF

Page 3: Force Newton’s Laws 1 First Law - Inertia Second Law – Force and Acceleration Third Law – Action and Reaction Introduction

ForceNewton’s Laws

3

First Law of Motion

Law #1

A body at rest will stay at rest unless acted upon by an external agent and a body in motion will remain

with the same motion, in a straight line, unless acted upon by an external agent.

In other words, a change in a particle’s (body’s) speed or direction can only occur if there is an external force (agent) acting on it. This can also be seen for each component of the force.

Page 4: Force Newton’s Laws 1 First Law - Inertia Second Law – Force and Acceleration Third Law – Action and Reaction Introduction

ForceNewton’s Laws

4

There is something wrong with the way the ball bounces.

Do you know what it is?

Think about the forces that are present and their directions.

Think about Newton’s First Law.

Maybe the next animation will help.

Page 5: Force Newton’s Laws 1 First Law - Inertia Second Law – Force and Acceleration Third Law – Action and Reaction Introduction

ForceNewton’s Laws

5

Second Law of Motion

Law #2

The force acting on a body is equal to the product of its mass times its acceleration,

In other words, the sum of the forces acting on a particle is proportional to its acceleration. The mass is the constant of proportionality.

amF

Page 6: Force Newton’s Laws 1 First Law - Inertia Second Law – Force and Acceleration Third Law – Action and Reaction Introduction

ForceNewton’s Laws

6

Third Law of Motion

Law #3 Each action has an equal an opposite reaction.

In other words, for every force acting on a particle, there is an equal and opposite force that the particle puts on the object that gave it the original force.

Page 7: Force Newton’s Laws 1 First Law - Inertia Second Law – Force and Acceleration Third Law – Action and Reaction Introduction

ForceNewton’s Laws

7

Name some of the action/reaction pairs in this picture.

Page 8: Force Newton’s Laws 1 First Law - Inertia Second Law – Force and Acceleration Third Law – Action and Reaction Introduction

ForceNewton’s Laws

8

Name some of the action/reaction pairs in this picture.

Page 9: Force Newton’s Laws 1 First Law - Inertia Second Law – Force and Acceleration Third Law – Action and Reaction Introduction

ForceNewton’s Laws

9

Name some of the action/reaction pairs in this picture.

Page 10: Force Newton’s Laws 1 First Law - Inertia Second Law – Force and Acceleration Third Law – Action and Reaction Introduction

ForceNewton’s Laws

10

Name some of the action/reaction pairs in this picture.

Page 11: Force Newton’s Laws 1 First Law - Inertia Second Law – Force and Acceleration Third Law – Action and Reaction Introduction

ForceNewton’s Laws

11

Name some of the action/reaction pairs in this picture.

Page 12: Force Newton’s Laws 1 First Law - Inertia Second Law – Force and Acceleration Third Law – Action and Reaction Introduction

ForceNewton’s Laws

12

Name some of the action/reaction pairs in this picture.