Physics

• kinetic energy =0.5 x mass x (speed)^2
• elastic potential energy = 0.5 x spring constant x (extension)^2
• gravitational potential energy = mass x gravitational field strength x height
• change in thermal energy = mass x specific heat capacity x temperature change
• power = energy transferred/time
• power = work done/ time
• efficiency = useful output energy transfer/ total input energy transfer
• efficiency = useful power output / total power input
• charge flow = current x time
• potential difference = current x resistance
• power = potential difference x current
• power = (current)^2 x resistance
• energy transferred = power x time
• energy transferred = charge flow x potential difference
• density = mass/ volume
• thermal energy for a change of state = mass x specific latent heat
• (For gasses) Pressure x volume = constant
• weight = mass x gravitational field strength
• work done = force x distance (along the time of the action of the force)
• force = spring constant x extension
• moment of a force = force x distance (normal to direction of force)
• pressure = force normal to a surface/ area of that surface
• distance travelled = speed x time
• acceleration = change in velocity/ time taken
• (final velocity)^2 - (initial velocity)^2 = 2 x acceleration x distance
• resultant force = mass x acceleration
• momentum = mass x velocity
• force = change in momentum / time taken
• period = 1/ frequency
• wave speed = frequency x wavelength
• magnification = image height / object height