Notes for Newton's 1st Law of motion

1. Force and Motion
Why do objects move?

2. 1. Newton’s First Law of Motion
force
constant speed
direction at rest
unbalanced net force
A is a push or a pull.
Every object keeps moving with
a and
, OR
unless acted on by
an , or a .

4. Arrows can be used to represent forces.
The of the arrow shows the SIZE
of the force.
The of the arrow shows the
DIRECTION of the force.
size
direction

5. FORCES
BALANCED UNBALANCED
When
forces cancel each
other out, the forces
are
UNBALANCED
force
How fast the
object speeds
up also
WHAT???
increases
increases
opposite
balanced

6. Balanced vs. Unbalanced Forces!

7. 2. Why do things stop???
opposes
contact
UNBALANCED
motion
Friction – the force that
the motion, between objects in
.
Friction is the force
that changes an object’s .

8. What does look like???FRICTION

9. Without
(OR !) all things
would continue to without
a change in !
friction
gravity
move
motion
**No change in speed or direction**

10. A
created
by a
push or
pull
BALANCED
FORCES
UNBALANCED
FORCES
Opposite
in
in size
change
in
Can be
opposite or
same
in size
causes
change in
direction
equal
no
motion
Force
direction
NOT
equal
ALWAYS
motion