Equations Flashcards
Weight =
Mass x gravitational field strength
Force applied to a spring =
Spring constant x extension
Acceleration =
Change in velocity
________
Time taken
Momentum =
Mass x velocity
Gravitational potential energy =
Mass x gravitational field strength x height
(1)
Power =
Work done
______
Time
Efficiency =
Useful power output
__________
Total power output
Charge flow =
Current x time
(2)
Power =
Potential difference x current
Energy transfer =
Power x time
Density =
Mass
______
Volume
Work done =
Force x distance
Distance travelled =
Speed x time
Resultant force =
Mass x acceleration
Kinetic energy =
0.5 x mass x (speed)^2
(3)
Power =
Energy transferred
____________
Time
Efficiency =
Useful output energy transfer
____________
Useful input energy transfer
Wave speed =
Frequency x wavelength
Potential difference =
Current x resistance
(4)
Power =
Current^2 x resistance
Energy transferred =
Charge flow x potential difference
Pressure =
Force normal to surface
__________
Area of surface
Moment of a force =
Force x distance from pivot
