Physics GCSE Equations NTK Flashcards
Link speed, distance travelled and time taken
Distance travelled = average speed x time
Time = distance ÷ speed
Speed = distance ÷ time
Distance travelled - metres
Time - seconds
Speed - metres per second or m/s
Link acceleration, change in speed and time taken
Acceleration = change in speed ÷ time
Time taken = change in speed ÷ acceleration
Change in speed = acceleration x time
Acceleration - metres per second squared
Time taken - seconds
Change in speed - metres per second
Link force mass and acceleration
Force = mass x acceleration
Mass = force ÷acceleration
Acceleration = force ÷ mass
Force - Newtons
Mass - kilograms
Acceleration - metres per second squared
Link weight mass and gravitational field strength
Weight = mass x Gravitational field strength
Mass = weight ÷ gfs
Gfs = weight ÷ mass
Weight - Newtons
Mass - kilograms
GFS - Newtons per kilogram or metres per second squared
Link efficiency, energy supplied and useful energy transferred
Efficiency = useful energy transferred by the device ÷ energy supplied to the device
Energy supplied = useful energy transferred ÷ efficiency
Useful energy transferred = energy supplied x efficiency
Efficiency - no unit or expressed as a percentage
Energy supplied - Joules
Useful energy transferred - Joules
Link mass, velocity and momentum
Momentum = mass x velocity
Mass = momentum ÷ velocity
Velocity = momentum ÷ mass
Momentum - kg m/s
Mass - kg
Velocity - m/s
Link frequency, wavelength and wave speed
Wave speed = frequency x wavelength
Frequency = wave speed ÷ wavelength
Wavelength = wave speed ÷ frequency
Wave speed - m/s
Frequency - Hertz, Hz or per second
Wavelength - metres
Link wave speed, distance travelled and time taken
Wave speed = distance travelled ÷ time taken
Distance travelled = wave speed x time
Time = distance travelled ÷ wave speed
Wave speed - m/s
Distance travelled - metres
Time - seconds
Link mass volume and density
Density = mass ÷ volume
Mass = volume x density
Volume = mass ÷ density
Density - kg/m3
Mass - kilograms
Volume - m3 (cubic metres)
Link work done , force and distance travelled in the direction of the force
Work done = force x distance moved in the direction of the force
Force = work done ÷ distance moved
Distance moved = wd ÷force
Work done - Joules
Force - Newtons
Distance moved - metres
Link gravitational field strength, gravitational potential energy, mass and change in height
GPE = mass x g x change in height
Mass = GPE ÷ ( g x Δ h)
g = GPE ÷ ( mass x Δ h)
Δ h = GPE ÷ ( mass x g)
GPE - Joules
Mass - kilograms
g - m/s2 or N/kg
Δ h - metres
Link kinetic energy, mass and velocity
Kinetic energy = ½ x mass x velocity2
Mass = 2 x KE ÷ velocity2
Velocity = square root of (2 x KE ÷ mass)
Kinetic energy - Joules
Mass - kilograms
Velocity - m/s
Link power, energy(Work Done) and time taken
Power = work done ÷ time taken
Work done = power x time
Time = work done ÷ power
Power - Watts
Work done - Joules
Time - seconds
Link charge, potential difference and energy transferred
Energy transferred = charge moved x potential difference
Charge = energy ÷ pd
pd = energy transferred ÷ charge
Energy transferred - Joules
Charge - Coulombs
pd - Volts (not voltage)
Link current, charge and time
Charge = current x time
Current = charge ÷ time
Time = charge ÷ current
Charge - Coulombs
Current - Amps
Time - seconds