Formulas Flashcards
pressure due to a column of liquid =
height of column × density of liquid
× gravitational field strength (g)
(p = h ρ g)
final velocity 2 – initial velocity 2 =
2 × acceleration × distance
v2 – u2 = 2 a s
For gases: pressure × volume
= constant
Mass × specific latent heat
Thermal energy for a change of state
potential difference across primary coil / potential difference across secondary coil
= number of turns in primary coil / number of turns in secondary coil
mass × specific latent heat
thermal energy for a change of state
Period
= 1 / frequency
Mass × specific heat capacity
× temperature change
= Change in thermal energy
Period
= 1 / frequency
Mass × specific heat capacity
× temperature change
= Change in thermal energy
force =
change in momentum / time taken
F = m ∆ v / ∆ t
elastic potential energy =
0.5 × spring constant × (extension) 2
(Ee = 1/2 k e2
density =
mass / volume
ρ = m / V
energy transferred =
charge flow × potential difference
E = Q V
energy transferred =
power × time
E = P t
power =
(current) 2 × resistance
(P = (I)2 R
power =
potential difference × current
P = V I
potential difference =
current × resistance
V = I R
charge flow =
current × time
Q = I t
wave speed =
frequency × wavelength
v = f λ
efficiency =
useful power output / total power input
efficiency = (energy transfer)
useful output energy transfer / total input energy transfer
power =
work done / time
P = W / t
power (transferred)=
energy transferred / time
P = E / t
mass × gravitational field strength
= weight
force × distance (along the line of action of the force)
= Work done
W = F s
Force applied to a spring
= spring constant × extension
F = k e
moment of a force =
force × distance (normal to direction of force)
M = F d
pressure =
force normal to a surface / area of that surface
p = F / A
distance travelled =
speed × time
s = v t
acceleration =
change in velocity / time taken
a = ∆ v / t
resultant force =
mass × acceleration
F = m a
momentum =
mass × velocity
= = m v
kinetic energy =
0.5 × mass × speed 2
Ek = 1/2 m v2
gravitational potential energy =
mass × gravitational field strength (g) × height
Ep = m g h
