equations <3

• Speed


  Speed = distance / time
• Acceleration


  Acceleration m/s2 = final velocity m/s - initial velocity m/s / time s
• Velocity


  Velocity = distance (in a particular direction) / time
• Resultant Force


  Resultant force in N = mass in kg x acceleration in m/s2
• Weight


  Weight in N = mass in kg x gravity in m/s2
• Hooke's Law


  Force applied in N = spring constant in N/m x extension in m
• Work Done


  Work done in J = Force in N x distance moved in the direction of the force in m
• Change in Gravitational Potential Energy

  Change in gravitation potential energy in J = mass in kg x gravitational field strength in N/kg x change in height in m
• Power


  Power in W = energy in J / time in s
• Kinetic Energy


  Kinetic energy in J = 1/2 x mass in kg x velocity2 in m/s
• Momentum


  Momentum in kg m/s = mass in kg x velocity in m/s
• Current

  Current in A = charge in C / time in s
• Potential Difference

  Potential difference in V = work done in J / Charge in C
• Resistance


  Resistance in ohms = potential difference in V / current in A
• In a Series and Parallel Circuits, the current depends on... (word and symbol equation) Current - I = potential difference V / resistance R
• Frequency


  Frequency in Hz = 1 / time in s
• Power of Appliance


  Power in w = current in A x potential difference in V
• Charge


  Charge in c = Current in a x time in s
• Energy

  Energy in J = potential difference in V x charge in c
• Period =


  Frequency / 1
• Power (W) =

  Energy transferred (J) / time (s)
• Power (W) =

  Work done (J) / time (s)
• Efficiency

  Useful energy output / total energy input (both J)
• Kinetic Speed (kg m2 / s2)


  0.5 x (speed)^2 9m/s) x mass (kg)
• Weight (N) =

  gravitational force (m/s^2) x mass (g/kg)
• Hooke's Law (N) =

  Spring constant (N/m) x extension (m)
• Speed (m/s) =

  Distance (m) / time (s)
• Wave speed (m/s) =

  frequency (Hz) x wavelength (m)
• Force (N) =

  Magnetic flux density (T) x current (A) x length (m)
• Power (W) =

  Potential difference (V) x current (A)
• Potential difference (V) =

  current (A) x resistance (ohms)
• Average speed =

  final speed - intial speed (m/s) / time (s)
• Uniform acceleration (m/s^2)

  (final velocity)^2 - (initial velocity)^2 (both m/s) = 2 x acceleration (m/s^2) x distance (m)
• Pressure in a fluid? =

  Force (N) / area (m^2/cm)
• Moment (Nm) =

  Force (N) x distance (m)
• Gravitation potential energy =

  Mass (kg) x gravity (m/s^2) x height (m)
• Energy transferred =


  Power (W) x time (s)
• Work done =


  force (N) x distance (cm/m)
• Resultant force (N) =

  [mass (g) x gravity (m/s^2)] + friction (N)
• Momentum (kgm/s) =

  Force (N) x velocity (m/s)