Equations Flashcards
Speed =
Distance/ time
Acceleration =
Change in velocity / time
Weight =
Mass x gravitational field strength
Force =
Mass x acceleration
Momentum =
Mass x velocity
Moment =
Force x distance from perpendicular pivot
Electrical power =
Current x voltage
Voltage =
Current x resistance
Charge =
Current x time
Wavespeed =
Frequency x wavelength
Refractive index =
Sin angle I/sin angle r
Sin C =
1/ refractive index
Efficiency =
Useful energy output/ total energy output
Work done =
Force x distance moved
Power =
Work done/ time
Kinetic energy =
1/2 x mass x speed2
GPE =
Mass x g x height
g is always 10 m/s2
Density =
Mass/volume
Pressure =
Force/area
Pressure difference =
Height x density x g
g is always 10 m/s2
Input (primary) voltage / output (secondary) voltage =
Primary turns / secondary turns
Potential difference =
Energy difference / charge
Momentum before =
Momentum after
Total clockwise =
Total anticlockwise
(pressure x volume) P1 x V1=
P2 x V2
constant
Kelvins =
Degrees + 273
Force acting =
Change in momentum/ time take for change
Energy transferred =
Current x voltage x time
Frequency =
1/time period
Energy transferred =
Work done
Input power (Vp x Ip) =
Output power (Vs x Is)
For 100% efficiency
