EQUATIONS Flashcards
(34 cards)
1
Q
acceleration
A
(v-u)/t
2
Q
kinetic friction
A
Fk= ukN
3
Q
static friction
A
Fs= usN (N=normal contact force)
4
Q
momentum
A
mass x velocity
5
Q
Force with p
A
impulse/ change in t
6
Q
density
A
mass/volume
7
Q
pressure
A
force/area. pgh
8
Q
weight
A
mass x g
9
Q
young modulus
A
stress/strain
10
Q
Spring constant k
A
F/x
11
Q
stress
A
Force/area
12
Q
strain
A
extension/original length
13
Q
power
A
force x velocity
14
Q
GPE
A
mgh
15
Q
KE
A
1/2 x m x v^2
16
Q
elastic strain energy
A
1/2 Fx (if obeying Hooke). same as 1/2 kx^2
17
Q
efficiency
A
(useful out/total in) x100
18
Q
charge
A
I x t
19
Q
resistance
A
V/I
20
Q
electrical power
A
V x I. I^2R. V^2/R
21
Q
resistivity
A
R=pl/A
22
Q
energy transferred
A
QV, ItV, I(R+r), V + Ir
23
Q
resistors in series
A
R1 + R2 …
24
Q
resistors in parallel
A
1/Rt= 1/R1 + 1/R2…
25
wave speed
f x lambda
26
frequency
1/T, T= time period
27
refractive index, n
v1/v2, n1sinº1=n2sinº2
28
critical angle, C
arcsen(1/n)
29
Malu's law
Intensity x cos^2º
30
hf
work function + 1/2mv^2
31
pV
nRT
32
Activity, A
- (dN/dT). lambda x N
33
energy transferred photoelectric
nhf
34
pV with components
1/3 N m
