Chapter 4
Forces and Newton’s
Laws of Motion
Copyright © 2015 John Wiley & Sons, Inc. All rights reserved.
,4.1 The Concepts of Force and Mass
A force is a push or a pull.
Contact forces arise from physical
contact .
Action-at-a-distance forces do not
require contact and include gravity
and electrical forces.
Copyright © 2015 John Wiley & Sons, Inc. All rights reserved.
,4.1 The Concepts of Force and Mass
Arrows are used to represent forces. The length of the arrow
is proportional to the magnitude of the force.
15 N
5N
Copyright © 2015 John Wiley & Sons, Inc. All rights reserved.
, 4.1 The Concepts of Force and Mass
Mass is a measure of the amount
of “stuff” contained in an object.
Copyright © 2015 John Wiley & Sons, Inc. All rights reserved.
Forces and Newton’s
Laws of Motion
Copyright © 2015 John Wiley & Sons, Inc. All rights reserved.
,4.1 The Concepts of Force and Mass
A force is a push or a pull.
Contact forces arise from physical
contact .
Action-at-a-distance forces do not
require contact and include gravity
and electrical forces.
Copyright © 2015 John Wiley & Sons, Inc. All rights reserved.
,4.1 The Concepts of Force and Mass
Arrows are used to represent forces. The length of the arrow
is proportional to the magnitude of the force.
15 N
5N
Copyright © 2015 John Wiley & Sons, Inc. All rights reserved.
, 4.1 The Concepts of Force and Mass
Mass is a measure of the amount
of “stuff” contained in an object.
Copyright © 2015 John Wiley & Sons, Inc. All rights reserved.
