# Staar Physics Reference Chart

STA
AR
STAAR PHYSICS
TM
RefeRenCe MATeRIAlS
State of Texas
Assessments of
fORCe AnD MOTIOn
d
displacement
=
Average velocity
v
=
avg
change in time
t
v
v
final velocity
initial velocity
=
f
i
Acceleration
a
=
t
change in time
2
2
v
v
2
2
(
final velocity)
(
initial velocity)
=
Acceleration
f
i
a
=
2∆
d
2
(
displace
m m ent)
(
)(
)
(
)
2
1
initial
change
change
1
2
=
Displacement
d
=
v t
+
a t
+
(acceleration)
velocity
in time
in time
2
2
i
2
v
2
(tangential velocity)
=
Centripetal acceleration
t
a
=
r
c
=
F
ma
=
Net force
(mass)(acceleration)
net
=
Work
W
Fd
=
(force)(distance)
τ
=
Torque
= Fr
(force)(lever arm)
W
work
=
Power
P
=
t
time
Pythagorean theorem
2
2
2
a
b
c
+
=
GRAVITATIOnAl, eleCTRICAl, AnD MAGneTIC fORCeS
(
)
(
)(
)
( )
mass of
mass of
(
)
Force of gravitational
1st object
2nd object
m m
universal
1
2
=
(
)
attraction between
F
G
=
gravitation
2
distance between
g
2
d
2 objects
constant
centers of objects
(
)
(
)(
)
) (
charge of
charge of
Force between
(
)
q q
1st particle
2nd particle
Coulomb’s
=
1 2
2 charged
F
k
=
constant
2
2
electric
C
d
particles
(distance between particles)
=
Electrical power
P
VI
=
(voltage)(current)
V
voltage
=
I
Current
=
R
resistance
R
R
R
R
. . .
=
+
+
+
Equivalent resistance for resistors in series
1
2
3
1
1
1
1
. . .
Equivalent resistance for resistors in parallel
=
+
+
+
R
R
R
R
1
2
3