Equations Flashcards
Momentum equation:
Momentum (Kgm/s)= mass (Kg) x velocity (m/s)
Gravitational potential energy equation:
Gravitational potential energy (J) = mass (Kg) x gravity (N/m) x height (m)
GPE =mgh
2 Wave speed equation:
Wave speed (m/s) = Wavelength (m) x frequency (Hz)
Speed (m/s) = distance (m) / time (s)
Kinetic energy equation:
Kinetic energy (J) = 0.5 x mass (Kg) x velocity^2 (m/s)
KE = 1/2 mv^2
Force equations (Newtons 2nd law):
Force (N) = mass (Kg) x acceleration (m/s^2)
Current definition + Equation:
How many coulombs pass a point per second
Current (A) = charge (C) / time (s)
Voltage definition + equation:
How much energy each coulomb has
Voltage (V) = Energy (J) / charge (C)
Resistance equation:
Resistance = Voltage (v) / Current (A)
Power definition + 3 equation:
The rate of energy transfer
Power (W) = Energy (J) / time
Power (W) = work done (J) /time (s)
Power (W) = Voltage (V) x current (A)
Work done equation:
Work done (J) = Force (N) x distance (m)
Work = Fd
Density equation:
Density (Kg/m^3) = Mass (kg) / volume (m/s^2)
Acceleration equation:
Acceleration = change is speed (m/s) / time (s)
Efficiency equation:
Efficiency = (useful energy output / total energy input transfer) x 100
Weight equation:
Weight (N) = mass (Kg) x gravity (N/m)
Force on conductor carrying current equation:
Force (N) = Magnetic flux density (T) x current (A) x length (m)
F = BIL
