Equations Flashcards
How do you calculate weight?
Weight = Mass x gravitational field strength
How do you calculate work done?
Woke done = Force x distance
How do you calculate force applied to a spring?
Force = Spring constant x extension
How do you calculate moment of a force?
Moment = Force x distance (perpendicular to force)
How do you calculate pressure?
Pressure = Force / area
How do you work our distance travelled?
Distance = Speed x time
How do you work out acceleration?
Acceleration = Change in velocity / time taken
How do you work out resultant force?
Resultant force = Mass x acceleration
How do you work out momentum?
Momentum = Mass x velocity
How do you work out kinetic energy?
Kinetic energy = 1/2 x mass x speed (squared)
How do you work out gravitational potential energy?
Gravitational potential energy = mass x gravitational field strength x height
How do you work out power in terms of energy?
Power = energy transferred or work done / time
How do you calculate efficiency in terms of energy transfer?
Efficiency = useful output energy transfer / total input energy transfer
How do you work out efficiency in terms of power?
Efficiency = Useful power output / total power input
How do you calculate wave speed?
Wave speed = Frequency x wavelength
How do you calculate potential difference?
Potential difference = current x resistance
How do you calculate power in terms of current? State both equations.
Power = potential difference x current
Power = current (squared) x resistance
How do you calculate energy transferred in terms of power?
Energy transferred = power x time
How do you calculate energy transferred in terms of charge flow?
Energy transferred = charge flow x potential difference
How do you calculate density?
Density = Mass / volume
How do you work out charge flow?
Charge flow = current x time
What is the equation to calculate force for a conductor at 90° to a magnetic field and carrying a current?
Force = magnetic flux density (T - Tesla) x current x length
What is the equation to calculate a period?(In waves)
Period (secondsw) = 1/frequency (hertz)
What is the wave equation?
Wave speed (m/s) = frequency (hertz) x wavelength (m)
