Physics Test
Review
Test Tuesday
Newton’s 1st Law of Motion
1.
2.
An object at rest will remain at
rest, and an object in motion will
remain in motion until acted upon
by an Unbalanced Force .
Also known as Inertia .
Newton’s 2nd Law of Motion
2. Force = mass × acceleration
Newton’s 3rd Law of Motion
 Every
action has an equal and
opposite reaction.
Forces
Forces act on matter to change its position
and create motion .
 Any push or pull is a force.
 Unit of force = Newton
.
 Friction is a force which will slow down
or stop an object.
 Gravitational force pulls everything to
the center of the Earth.

Forces
 Weight
is measured on a scale .
 Mass is measured on a balance .
 Where would you weigh the least
amount?
–
Moon
–
Earth
Forces
 An
object falls due to gravity .
 Gravity will cause the mass of a falling
object to accelerate
.
 If dropped, which would hit the ground
first?
Bowling ball
– Baseball
–
Both would hit at
the same time.
Forces
Force = mass × acceleration
F
M A
Force is
measured in
Newtons.
Force = Mass × Acceleration
 Acceleration
is the rate of change in
an object’s velocity.
 Object speeds up = acceleration
 Object slows down = deceleration
 Unit for acceleration = m/s² .
Speed
Speed = distance
D
S T
/
time
Speed is
measured in
m/s.
Work
Work = Force
× distance
W
F d
Work is
measured
in Joules.
Practice Problems

If sound travels at a speed of
330
330 m/s
m/s, how long would it
take you to hear thunder 1,750
1,750
meters away?
What information do you know?
Speed = 330 m/s
Distance = 1,750 meters
Which
Speed=
equation
Distance
should
/ Time
you use?
Practice Problems

If a force of 3000 N can move
a crate at an acceleration of
1.5
1.5m/s2,
m/s² what is the mass of
the object?
What information do you know?
Force = 3000 N
Acceleration = 1.5 m/s²
Which
Force=equation
Mass × Acceleration
should you use?
Practice Problems
 How
much work does an
elephant do while moving a circus
wagon 20
20 meters
meters will a pulling
force of 200 N
N?
What information do you know?
Distance = 200 N
Force = 200 N
Which
Work=equation
Force × should
Distance
you use?
Distance (yards)
Pace for One Runner
45
40
35
30
25
20
15
10
5
0
1
2
3
Time (seconds)
4
5
Distance-Time Graphs
Distance (yards)
Pace for One Runner
45
40
35
30
25
20
15
10
5
0
1
2
3
4
5
Time (seconds)
Where was the runner at rest? 0-1 seconds, 3-4 seconds
Where was the runner’s speed the fastest? 1-2 seconds
What a blast lab data chart
Height of
Ramp
Length of
Ramp
Mass of
Marble
Average
Distance
Marble Rolled
2 cm
88 cm
1g
188 cm
4 cm
88 cm
1g
376 cm
8 cm
88 cm
1g
752 cm
16 cm
88 cm
1g
1504 cm
What would be the initial problem for this investigation?
At
How
which
will point
the height
wouldofthe
themarble
ramp affect
have potential
how far the
energy?
marble will roll?
What
At thewould
top ofthe
theindependent
ramp
variable be in this investigation?
What
Rampwould
heightthe dependent variable be in this investigation?
Distance
What would
marble
the control
rolled variables be in this investigation?
Length of ramp, mass of marble
Newton’s Laws of Motion




You hit the cue ball into eight ball to win a
pool game. 1st Law of Motion
Professional baseball players use wooden
bats with more mass than aluminum bats
with less mass. 2nd Law of Motion
Exploding fuel in a rocket ship propels
the rocket into space. 3rd Law of Motion
It is easier to push a car in neutral than a
bus in neutral. 2nd Law of Motion
Practice Problems

Amanda, a student in science class,
walked backwards with an average
speed of 3 m/s. If she completed
her walk in 15 seconds, what was
the total distance she traveled in
meters?
Practice Problems

You are moving a dresser that
has a mass of 36 kg. Its
acceleration is 0.5 m/s2. What
is the force being applied?
Practice Problems

You drive a total of 600 km in 12
hours. On average, how fast
were you driving?
Practice Problems

If 450 J of work is done to push a
toy truck up the driveway 15
meters, how much force are you
applying to the toy truck?