Equations Flashcards
Velocity =
Increase in displacement / time taken
Speed =
Distance travelled \ time taken
Acceleration =
Change in velocity / time taken
Force is proportional to what ?
Acceleration
Acceleration is inversely proportional to ??
Mass
Force (N) =
Mass (kg) x acceleration
Weight =
Mass of object (kg) x acceleration due to gravity
Momentum =
Mass (kg) x velocity
Force =
Change in momentum / time taken
Increase in momentum =
Force x time
Momentum before collision =
Momentum after collision
Moment of force (Nm) =
Force (N) x perpendicular force from pivot
Orbital speed =
2 x pi x orbital radius / time period
Power (watts) =
Current (amps) x voltage
Energy converted (j) =
Power (watts) x time (seconds)
Charge (coulombs) =
Current (amps) x time (seconds)
Voltage =
Current (amps) x resistance (ohms)
Frequency (hertz) =
1 / time period (seconds)
Wave speed (m/s) =
Frequency (hertz) x wavelength (m)
Refractive index =
Sine (incidence angle) / sine (refractive index)
Sine (critical angle) =
1 / refractive index
Work done (joules) =
Force (N) x distance (M)
Change in GPE (joules) =
Mass (kg) x gravity x distance raised against gravitational force (metres)
Kinetic energy =
1/2 x mass (kg) x speed (m/s)
Power (watts) =
Work done (joules) / time taken (s)
Gain in GPE =
Gain in GPE = gain of kinetic energy before impact
Density =
Mass / volume
Pressure (pascals) =
Force (N) / area (m/2)
Pressure difference (pascals) =
Height (M) x density x gravity
Pressure 1 x volume 1=
Pressure 2 x volume 2
Pressure 1 / temperature 1 =
Pressure 2 / temperature 2
Input voltage / output voltage =
Number of turns on primary coil / number of coils on secondary
