Equations Flashcards
Wave speed, frequency and wave length
Wave speed = frequency x wave length
Frequency, 1 and time period
Frequency = 1/time period
Refractive index (n), angle of incidence and angle of refraction
N = sinI/ sinR
Refractive index (n), 1 and critical angle
N = 1/ sinC
Efficiency, useful output energy, input energy
Efficiency = useful output energy/ input energy x100
God, m, g , h
Gpe = m x g x h
Ke, m, v
Ke = 1/2 x m x v^2
V= square root {2Ke/m}
Work done, force and distance
Work done = force x distance from
Power, work done and time
Power = work done or energy/ time
Charge, current and time
Charge = current/ time
Voltage, current and resistance
Voltage = resistance x current
Power, current and voltage
Power = current x voltage
Acceleration, initial speed, final speed and time
Acceleration = (final speed - initial speed) / time taken for change in speed
Force, mass and acceleration
Resultant force = mass x acceleration
Weight, mass and gravitational thingy
Weight = m x g
Moment, force and perpendicular distance
Moment = force x perpendicular distance
Hookes law
Force 🐟 extension
Force, final momentum, initial momentum and time taken for momentum change
Force = (final momentum - initial momentum) / time
Density, mass and volume
Density = mass/ volume
Pressure, force and area
Pressure = force/ area
Pressure, height, density and gravitational thingy
Pressure = height x density x g
Momentum, mass and velocity
Momentum = mass x velocity
Voltage, energy transfer and charge
Voltage = energy transfer/ charge
Force, change in momentum and time
Force = (mv-mu)/t
Pressure law
P1/T1 = P2/T2
Voltage and number of turns in a transformer
Vp/Vs = Np/Ns
Current and voltage in a transformer
IpVp = IsVs
