equations Flashcards
1
Q
Power
A
current X voltage
P = IV
2
Q
voltage
A
current X resistance
V = IR
3
Q
charge
A
current X time
Q = It
4
Q
energy transfered
A
charge X voltage
E = VQ
5
Q
wave speed
A
freq. X wavelength
v = f λ
6
Q
refractive index
A
n = sin(i) / sin(r)
7
Q
critical angle
A
sin(C) = 1/n
sin(critical angle) = 1/ refractive index
8
Q
efficiency
A
useful energy output/ total energy input
9
Q
work done
A
force X distance moved
W = Fd
10
Q
gravitational potential energy
A
mass X gravitational field strength X height
GPE = mgh
11
Q
kinetic energy
A
1/2 X mass X speed^2
KE = 1/2mv^2
12
Q
speed
A
distance / time
s = d/t
13
Q
acceleration
A
change in velocity / time taken
a = (v-u)/t
14
Q
weight
A
mass x gravitational field strength
W = mg
