Motion
Motion Vocabulary
1.
motion
16.
momentum
2.
speed
17.
work
3.
velocity
18.
joule
4.
acceleration
19.
power
5.
force
20.
watt
6.
newton
21.
work input
7.
net force
22.
work output
8.
friction
23.
wave
9.
gravity
24.
transverse wave
10.
weight
25.
longitudinal wave
11.
mass
26.
amplitude
12.
terminal velocity
27.
wavelength
13.
free fall
28.
reflection
14.
projectile motion
29.
refraction
15.
inertia
Speed vs. Velocity
Speed - SI unit m/s
 distance traveled divided
by the time interval during
which the motion occurred
Velocity – SI unit m/s
plus direction
 speed of an object in a
particular direction
Acceleration – pg. 514
 rate at which velocity
changes over time; an
object accelerates if its
speed, direction, or both
change.
 a = v2 – v1/ t
Force – SI unit N – pg. 517
 a push or a pull exerted on
an object in order to
change the motion of the
object; force has size and
direction
 net force – combination of
all the forces acting on an
object
 balanced force – when
the forces on an object
produce a net force of 0 N
copy question & answer in notebook
1. How is velocity different from speed?
2. How does the direction of the net force on a object
compare to the direction of its motion?
3. How does a net force of 0 N impact an object’s motion?
Friction – pg. 521
a force that opposes
motion between two
surfaces that are in
contact
kinetic friction – pg. 522
static friction – pg. 523
Gravity – pg. 527
a force of attraction
between objects that is
due to their masses
mass affects
gravitational force –
pg. 528
distance affects
gravitational force –
pg. 529
weight vs. mass
weight
mass
 measure of the
gravitational force exerted
on an object
 a measure of the amount
of matter in an object
Newton’s 1st law of motion
 An object at rest remains at rest, and an object in motion
remains in motion at a constant speed and in a straight
line unless acted on by an unbalanced force.
Newton’s 2nd law
 The acceleration of an object depends on the mass of
the object and the amount of force applied.
F=mxa
a = F/m
Newton’s 3rd law
 When one object exerts a force on a second object, the
second object exerts an equal and opposite force on the
first.
Momentum
a quantity defined as the
product of the mass and
velocity of an object
 p=mxv
Science math equations to know
 speed
 average speed = total distance / total time
 s=d/t
 Newton’s 2nd law
 Force = mass x acceleration
 F=mxa
 acceleration
 average acceleration = final velocity – initial velocity / time
 a = v2 – v1 / t
 momentum
 momentum = mass x velocity
 p=mxv