PHYSICS REVIEW SHEET
UNITS: 7 fundamental units
1kg  1000 g  1g  1/1000kg
Mass: kg, g
Length: km, m, mile 1km  1000m  1m  1/1000km
1hr  3600s
Time: hr, s
Converting Units
1
km 10 00 m 10


m/ s
hr 36 00 s 36
ex. 90km / h  90 
10
m / s  25m / s
36
Scientific Notation – decimal comes after the first digit
a.bc  10 x
ex.
0.000000789  7.89  107
ex.
950000000  9.50  108
Graphing Data: slope 
rise y

run x
Slope of a distance-time graph gives the velocity (speed).
Slope of a velocity-time graph gives the acceleration.
An example of a linear relationship: straight line
An example of a square relationship: parabola
Area under graph of a velocity-time graph give the distance.
Trapezoid : A 
1
1
b  h1  h2  ; Triangle : A  b  h; Rectangle : A  b  h
2
2
Scalar & Vector Quantities
What is a scalar: magnitude only.
Ex: mass, speed, distance, time
What is a vector: both magnitude & direction.
Ex: velocity, acceleration, force
Add vectors tail-to-head
Components of vectors: Vx  V cos 
Vy  V sin 
Angle always measured from the x-axis counterclockwise
1
Kinematics
Constant motion: velocity remains constant; acceleration is zero v 
Accelerated motion: velocity changes (3 equations of motion)
a
v f  vi
t
1
d  vi t  at 2 ;
2
 v f  vi  at ;
d
t
km/h; m/s
m/s2
v f 2  vi 2  2ad
Newton’s 3 Laws: Law of Inertia; Law of Acceleration; Law of Force Pairs F  ma
Weight is a force w  m  g
Unit: N  kg  m / s 2
Two-Dimensional Motion & Trajectories
Free fall motion: a  g  9.80m / s 2
Time to fall vertically down is same as time traveled horizontally.
Vertical motion:
v f  vi  gt ;
Horizontal motion:
d  vh  t
d
1 2
gt ;
2
v f 2  vi 2  2 gd
TEST YOURSELF…WHAT DO YOU UNDERSTAND?
1. SCIENTIFIC & DECIMAL NOTATION
a. How do you write a decimal in scientific notation?
b. What is the form?
2. METRIC PREFIXES
a. What are the metric prefixes?
b. What values do the symbols represent?
3. MOTION
a. What is motion?
b. How do you measure motion?
4. SCALARS & VECTORS
a. What is a Scalar?
b. What is a Vector?
c. Give some examples of both scalar and vector quantities.
5. VELOCITY
a. What is Velocity?
b. What is the formula for Velocity?
2
c. What is the Unit?
d. Is it a Scalar or Vector?
6. MOMENTUM
a. What is momentum?
b. What is the formula for momentum?
c. What is the unit of momentum?
7. ACCELERATION
a. What is Acceleration?
b. What is the formula for acceleration?
c. What is the unit for acceleration?
3