Equations Flashcards
1
Q
Speed
A
Distance / Time
2
Q
Force (not pressure)
A
Mass x Acceleration
3
Q
Acceleration
A
Change in speed / Change in time
4
Q
Work done
A
Force x Distance
5
Q
K.E
A
0.5 x mass x velocity squared
6
Q
G.P.E
A
M.G.H
7
Q
Pressure
A
Force/Area
8
Q
Moment
A
Force / Perpendicular distance from pivot
9
Q
Charge
A
Q = IT
10
Q
Voltage
A
V=IR
11
Q
Electrical power
A
P = IV
12
Q
Energy transfered
A
ITV
13
Q
Wavespeed
A
Frequency x wavelength
14
Q
Frequency
A
1 / Time period
15
Q
Input voltage / Output voltage =
A
No. of primary turns / No. of secondary turns
16
Q
Refractive index
A
Sin 1 / Sin r
17
Q
Angle of incidence =
A
Angle of incidence = angle of reflection
18
Q
Critical angle
A
Sin C = 1 / n
19
Q
Pressure difference
A
H D G
20
Q
P1V1 =
A
P2V2
21
Q
Thumb =
A
Force
22
Q
First finger =
A
Field
23
Q
Second finger =
A
Current
24
Q
Input power =
A
Output power
25
Vp Ip =
Vs Is
26
Pressure and temperature (t in kelvins)
P1 / T1 = P2 / T2
27
Density
Mass / Volume
28
Power (not electrical)
Work done / Time
29
Efficiency
Useful energy output / total energy input
30
Momentum
Mass x velocity
31
Weight
Mass x gravity
32
Orbital speed
2 x π x orbital radius / time
