Equations Flashcards
(19 cards)
Weight =
mass x gravitational field strength
Force applied to a spring =
spring constant x extension
Acceleration =
change in velocity / time
Momentum =
mass x velocity
GPE =
mgh
Power =
- work done / time
- energy transferred / time
- p.d x current
- current2 x resistance
Efficiency (power output) =
useful power output / total power output
Charge flow =
current x time
Energy transferred =
- power x time
2. charge flow x p.d
Density =
mass / volume
Work done =
force x distance (along the line of action of the force)
Distance travelled =
speed x time
Resultant force =
mass x acceleration
Kinetic energy =
0.5 x mass x (speed)2
Efficiency (energy transfer) =
useful output energy transfer / total input energy transfer
Wave speed =
frequency x wavelength
Potential difference =
current x resistance
Pressure =
force normal to a surface / area of that surface
Moment of a force =
force x distance (normal to direction of force)
