EQ Flashcards
linking average speed, distance and time
average speed = distance moved/ time taken
linking acceleration, change in speed, time
acceleration = change in velocity/time taken
force, mass, acceleration
F = m x a
weight, mass, gravitational field strength
W = m x g
moment, force, perpendicular distance from pivot
moment = force x perpendicular distance from pivot
power, current, voltage
P = I x V
energy transferred, current, voltage, time
E = I x V x t
Voltage, current, resistance
V = I x R
Charge, current, time
Q = I x t
Energy transferred, charge, voltage
E = Q x V
Wave speed, frequency, wavelength
𝑣 = 𝑓 × λ
frequency, time period
f = 1/t
refractive index, angle of incidence, angle of refraction
n = sin(i)/sin(r)
critical angle, refractive index
sin(c) = 1/n
Efficiency, useful energy output, total energy output
Efficiency = (useful energy output / total energy output) × 100%
Work done, force, distance moved
W = F x d
gravitational potential energy, mass, gravitational field strength, height
GPE = m x g x h
Kinetic energy, mass, speed^2
𝑘𝑖𝑛𝑒𝑡𝑖𝑐 𝑒𝑛𝑒𝑟𝑔𝑦 = ½ × 𝑚𝑎𝑠𝑠 × 𝑠𝑝𝑒𝑒𝑑^2
power, work done, time taken
P = W/t
density, mass, volume
ρ = m/V
Pressure, force, area
P = F/A
pressure difference, height, density, gravitational field strength
p = h x ρ x g
pressure, kelvin temperature of a fixed mass of gas at a constant volume
p1/ T1 = p2/T2
pressure, volume of a fixed mass of a gas at constant temperature
p1V1 = p2V2
input (primary), output(secondary) voltages and the turns ratio for a transformer
input (primary) voltage / output (secondary) voltage = primary turns / secondary turns
input power, output power
𝑽𝒑𝑰𝑷 = 𝑽𝒔𝑰𝒔 for 100% efficiency
orbital speed =
v = (2 x π x r) / t
change in wavelength, wavelength, velocity of a galaxy and the speed of light
change in wavelength / wavelength of reference galaxy = velocity of galaxy / speed of light
