Equations Flashcards
How to work out the weight?
Mass x gravitational field strength
How to work out the work done?
Force x distance (along the line of the force)
How to work out the force applied to a spring?
Spring constant x extension
How to work out the distacne travelled?
Speed x time
How to work out acceleration?
Change in velocity/time taken
How to work out momentum?
Mass x velocity
How to work out kinetic energy?
0.5 x mass x speed^2
How to work out gravitational potential energy?
Mass x gravitational field strength x height
The two ways of working out power ?
Work done /time
Or
Energy transferred/ time
Work dome and energy transferred mean same thing
Two ways to work out efficiency?
Useful output energy transfer/total input energy transfer
Or
Useful power output/total input energy transfer (this is for electricity)
How to work out wave speed?
Frequency x wavelength
How to work out charge flow?
Current x time
How to work put potential difference?
Current x resistance
Two ways of working out power in electricity?
Power = potential difference x current
Or
Power = current^2 x resistance
How to work put energy transfer?
Power x time
