physics equations Flashcards
(24 cards)
kinetic energy?
0.5 x mass x (speed)^2
elastic potential energy?
0.5 x spring constant x (extension)^2
gravitational potential energy ?
mass x gravitational field strength x height
change in thermal energy ?
mass x specific heat capacity x temperature change
power ? (1)
energy transferred / time
OR
work done / time
charge flow
current x time
efficiency ?
useful output energy transfer / total input energy transfer
OR
useful power output / total power input
potential difference
current x resistance
power ? (2)
potential difference x current
OR
(current)^2 x resistance
energy transferred ?
power x time
energy transferred
charge flow x potential difference
density
mass / volume
thermal energy for change of state
mass x specific latent heat
weight
mass x gravitational field strength
work done
force x distance
distance travelled
speed x time
acceleration
change in velocity / time taken
(final velocity)^2 - (initial velocity)^2
2 x acceleration x distance
resultant force
mass x acceleration
period
1 / frequency
wave speed
frequency x wavelength
potential difference across primary coil x current in primary coil =
potential difference across secondary coil x current in secondary coil
momentum
mass x velocity
force on a conductor (@ right angels to magnetic field) carrying current
magnetic flux density x current x length
