Equations Flashcards
distance travelled =
speed x time
acceleration =
change in velocity / time taken
force =
mass x acceleration
weight =
mass x gravitational field strength
momentum =
mass x velocity
change in GPE =
mass x gravitational field strength x change in vertical height
kinetic energy
1/2 x mass x velocity^2
efficiency =
useful energy transferred by device / total energy supplied by device
wave speed =
frequency x wavelength
wave speed (2) =
distance / time
work done =
force x distance moved in the direction of the force
power =
work done / time taken
energy transferred =
charge moved x potential difference
charge =
current x time
potential difference =
current x resistance
power =
energy transferred / time taken
electrical power =
current x potential difference
electrical power (2) =
current^2 x resistance
density =
mass / volume
force exerted on a spring =
spring constant x extension
final velocity^2 - initial velocity^2 =
2 x acceleration x distance
force =
change in momentum / time
energy transferred (2) =
charge x potential difference x time
force on a conductor at right angles to a magnetic field carrying a current =
magnetic flux density x current x length
pd across primary coil x current in primary coil =
pd across secondary coil x current in secondary coil
change in thermal energy =
mass x specific heat capacity x change in temperature
thermal energy for a change of state =
mass x specific latent heat
energy transferred in stretching =
1/2 x spring constant x extension^2
moment of a force =
force x distance normal to the direction of the force
pressure =
force normal to surface / area of surface
pd across primary coil / pd across secondary coil =
number turns in primary coil / number of turns in secondary coil
pressure 1 x volume 1 =
pressure 2 x volume 2
pressure due to a column of liquid =
height of column x density of liquid x gravitational field strength
