Equations Flashcards
Acceleration, change in velocity and time taken
(v-u)
A = ——
t
Weight, mass and gravitational field strength
Weight = mass x gravitational field strength
Acceleration, mass and resultant force
Resultant force = mass x acceleration
Initial speed, acceleration, final speed and distance
Final speed^2 = initial^2 + ( 2 x acceleration x distance)
v2 = u2 + (2as)
Applied force, spring constant and elastic extension
Force = spring constant x elastic extension
Momentum
Total momentum before and after collision are equal
Current, voltage and resistance
Voltage = current x resistance
Charge, voltage and energy
Energy = charge x voltage
Frequency and time period
1
Frequency —————
Time period
Refractive index, sine i and sine r
Refractive index = sine i / sine r
Refractive index, sine c
1
Refractive index = ————-
Sine c
Efficiency, useful energy and total energy
Useful energy
Efficiency = ——————-
Total energy
Density, volume and mass
Density =mass / volume
Work done, distance and force applied
Work = force x distance
Gravitational potential energy, mass, height and gravitational field strength
GPE = m x g x h
Kinetic energy, speed
Kinetic = 1/2 x mass x speed^2
Power, work and time taken
Work done = power x time taken
Pressure, force and area
Force = pressure x area
Pressure ( before and after), volume ( before and after )
P1V1 = P2V2
Pressure ( before and after), temperature ( before and after)
P1 P2
— = —
T1 T2
Mass(M), change in thermal energy (ΔQ), heat capacity (c), change in temperature (ΔT)
ΔQ = m x c x ΔT
Change in wavelength, velocity of a galaxy, reference wavelength and speed of light
Change in wavelength
———————————
Reference wavelength
=
Velocity of a galaxy
—————————
Speed of light
