Equations

• work done = force x distance moved
• weight = mass x gravitational field strength
• force applied to a spring = spring constant × extension
• distance = speed × time
• acceleration = change in velocity / time taken
• resultant force = mass × acceleration
• momentum = mass × velocity
• kinetic energy = 0.5 × mass × (velocity squared)
• gravitational potential energy = mass × gravitational field strength × height
• power = energy transferred / time
• power = work done / time
• efficiency = useful output energy transfer / total input energy transfer
• efficiency = useful power output / total power input
• wave speed = frequency x wavelength
• charge flow = current x time
• potential difference = current × resistance
• power = potential difference × current
• power = (current squared) × resistance
• energy transferred = power × time
• energy transferred = charge flow × potential difference
• density = mass / volume
• change in thermal energy = mass x specific heat capacity x change in temperature
• thermal energy for a change of state = mass x specific latent heat
• energy transferred in stretching = 0.5 x spring constant x (extension squared)