# physics formulae

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average speed =
distance / time
1 of 30
acceleration =
change in velocity / time taken
2 of 30
force =
mass x acceleration
3 of 30
weight =
mass x gravitational field strength
4 of 30
momentum =
mass x velocity
5 of 30
force =
change in momentum / time
6 of 30
orbital speed =
2 x π x (orbital radius/time period)
7 of 30
moment =
force x perpendicular distance between force and pivot
8 of 30
sum of clockwise movements =
sum of anticlockwise movements
9 of 30
work done =
force x distance moved in direction of force
10 of 30
power =
work done / time taken
11 of 30
change in gravitational potential energy =
weight x change in vertical height
12 of 30
kinetic energy =
1/2 x mass x velocity^2
13 of 30
efficiency =
useful energy transferred / total energy supplied
14 of 30
total energy before event =
total energy after event
15 of 30
charge =
current x time
16 of 30
voltage =
current x resistance
17 of 30
power =
voltage x current
18 of 30
electrical energy =
voltage x current x time
19 of 30
voltage across secondary coil / voltage over primary coil =
number of turns on secondary coil / number of turns on primary coil
20 of 30
secondary coil output power =
primary coil input power
21 of 30
wave velocity =
frequency x wavelength
22 of 30
frequency =
1 / time period
23 of 30
refractive index =
sine of angle of incidence / sine of angle of refraction
24 of 30
sine of critical angle =
1 / refractive index
25 of 30
density =
mass / volume
26 of 30
pressure =
force / area
27 of 30
pressure in a liquid =
liquid density x height of liquid x gravity
28 of 30
boyle's law is
p1v1 = p2v2
29 of 30
pressure law is
p1/t1 = p2/t2
30 of 30

## Other cards in this set

### Card 2

acceleration =

#### Back

change in velocity / time taken

force =

weight =

momentum =