Equations Flashcards
What is the equation relating speed, distance and time?
Speed (m/s)= distance(m)/ time (s)
What is the equation relating acceleration?
Acceleration (m/s squares) = change in velocity (v-u) / time (s)
What is the equation relating weight, mass and gravity?
Weight (N) = mass (kg) X gravity (N/kg)
What is the equation to find force?
Force (N) = mass (kg) X acceleration (m/s squared)
How do you find momentum?
Momentum (kg M/s) = mass (kg) X velocity (m/s)
How do you work out the change in gravitational potential energy?
gravitational potential energy (J) = mass (kg) X gravitational field strength (N/kg) X change in vertical height (m)
How to work out efficiency?
Efficiency = useful energy transferred by the devise / total energy supplied to the device
How to work out kinetic energy?
Kinetic energy (J) = 1/2 X mass (kg) X speed squared (m/s squared)
What is the equation relating wavespeed, frequency and wavelength
?
Wavelength ( ) = wave speed (m/s) / frequency (Hz)
What is the work done?
Work done (J) = Force (N) X distance (m)
What is the equation relating work done, power and time?
Workdone (J) = power (W) X time (s)
How do you work out charge?
Charge (c) = current (A) X time (s)
How do you work out energy transferred?
Energy transferred (J) = charge (c) X potential difference (V)
How do you work out potential difference ?
Potential difference (V) = current (A) X resistance ( )
How do you work out energy transferred using current, potential difference and time?
Energy transferred (J) = current (A) X potential difference (V) X time (s)
How to work out electrical power?
Electrical power (W) = current (A) X potential difference (V)
How else do you work out electrical power with current and resistance?
Electrical power (W) = current squared (C) X resistance
How to work out the force on a conductor at right angles to magnetic field?
Force on a conductor at right angles to magnetic field (N) = current (A) X magnetic field strength X length (m)
Potential difference in primary and secondary coil equation ?
Potential different in primary coil X current in primary coil = potential different in secondary coil X current in secondary coil
What is the equation relating mass denstity and volume ?
Density (kg/m cubed) = mass (kg) / volume (m cubed.
