# Staar Physics Reference Chart

STA
AR
STAAR PHYSICS
TM
RefeRenCe MATeRIAlS
State of Texas
Assessments of
fORCe AnD MOTIOn
displacement
= ∆
d
=
Average velocity
v
t
change in time
avg
v
v
final velocity
initial velocity
=
f
i
Acceleration
a
=
t
change in time
2
2
2
2
(
final velocity)
(
initial velocity)
v
v
=
Acceleration
f
i
a
=
2
(
displace
m m ent)
2∆
d
(
)(
)
(
)
2
initial
change
change
1
1
=
2
Displacement
(acceleration)
d
=
v t
+
a t
+
velocity
in time
in time
2
2
i
2
2
v
(tangential velocity)
=
Centripetal acceleration
t
a
=
r
c
=
Net force
(mass)(acceleration)
F
ma
=
net
=
Work
(force)(distance)
W
Fd
=
τ
=
= Fr
Torque
(force)(lever arm)
work
W
=
Power
P
=
t
time
2
2
2
Pythagorean theorem
a
b
c
+
=
GRAVITATIOnAl, eleCTRICAl, AnD MAGneTIC fORCeS
(
)
(
)(
)
mass of
mass of
(
)
( )
1st object
2nd object
universal
Force of gravitational
m m
(
)
=
1
2
gravitation
attraction between
F
G
=
2
distance between
g
2
d
constant
2 objects
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
(distance between particles)
particles
=
Electrical power
(voltage)(current)
P
VI
=
voltage
V
=
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