Equations Flashcards
Weight
= mass x gravity field strength
Work done
= force x distance
Force applied to string
= spring constant x extension
Distance
= speed x time
Acceleration
= change in velocity/ time taken
Resultant force
= mass x acceleration
Momentum
= mass x velocity
Kinetic energy
= 0.5 x mass x speed squared
Gravitational potential energy
= mass x gravity x height
Power
= energy transferred/ time
Or
= work done/ time
Efficiency
Useful power output/ total power input
Or
Useful output energy transfer/ total input energy transfer
Wave speed
= frequency x wavelength
Charge flow
= current x time
Pd
= current x resistance
Power
= pd x current
Power
= (current squared) x resistance
Energy transferred
= power x time
Or
Charge flow x pd
Density
= mass/volume
(Final velocity squared) - (initial velocity squared)
= 2 x acceleration x distance
Elastic potential energy
= 0.5 x spring constant x (extension squared)
Change in thermal energy
= mass x SHC x temperature change
Period
= 1/frequency
Force on a conductor carrying a current
= magnetic flux density x current x length
Thermal energy for change of state
= mass x specific latent heat
Pd across primary coil x current in primary coil
= pd across secondary coil x current in secondary coil
