Equations

• Distance travelled = average speed x time
• Acceleration = change in velocity / time taken
• Weight = mass x gravitational field strength
• Momentum = mass x velocity
• Change in gravitational potential energy = mass x gravitational field strength x change in vertical height
• Kinetic energy = 0.5 x mass x ( speed )^2
• Efficiency = useful energy transferred by the device / total energy supplied to the device
• Wavespeed = frequency x wavelength

  v = f x λ
• Wavespeed = distance / time
• Work done = force x distance moved in the direction of the force
• Power = work done / time taken
• Moment of force = force x distance normal to the direction of the force
• Energy transferred = charge moved x potential difference
• Charge = current x time
• Potential difference = current x resistance
• Power = energy transferred / time taken
• Electrical power = current x potential difference
• Electrical power = ( current )^2 x resistance
• Density = mass / volume
• Force exerted on a spring = spring constant x extension
• Pressure = force normal to surface / area of surface
• Magnetic flux density = tesla (T)
• Electrical resistance = ohm (Ω)
• Electrical charge = coulomb (C)
• Pressure = pascal (Pa)