Staar Physics Reference Chart Page 2
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1
2
3
4STAAR PHYSICS
RefeRenCe MATeRIAlS
eneRGY AnD MOMenTUM
1
= 1
2
=
2
(mass)(velocity)
Kinetic energy
KE
mv
2
2
(
)
acceleration
=
Gravitational potential energy
(mass)
(height)
PE
mgh
=
due to gravity
g
(
)(
)
2
spring
distance stretched
1
= 1
2
=
Elastic potential energy
PE
kx
constant
or compressed
2
elastic
2
=
Energy
(power)(time)
E
Pt
=
=
Work
change in kinetic energy
W
KE
= ∆
=
+
Mechanical energy
kinetic energy
potential energy
ME
=
KE + PE
Law of conservation of energy
KE
PE
KE
PE
+
=
+
i
i
f
f
=
Momentum
(mass)(velocity)
p
mv
=
=
=
Impulse
(force)(change in time)
(mass)(change in velocity)
J
=
F t
∆
=
m v
∆
Law of conservation of momentum
m v
m v
m v
m v
+
=
+
1 1
2 2
1 1
2 2
i
i
f
f
(
)(
)
(mass) specific
change in
Q
mc
T
=
=
∆
Heat gained or lost
heat
temperature
p
WAVeS AnD lIGHT
=
Velocity
(frequency)(wavelength)
v
= λ
f
1
1
1
1
1
1
=
+
=
+
Focal length
distance to image
distance to o
b b ject
f
d
d
i
o
=
2
2
Energy
(mass)(speed of light)
E
=
mc
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