Physics equations

• average speed = distance moved / time taken (m/s)
• acceleration = change in velocity / time taken
• force = mass × acceleration
• weight = mass × gravitational field strength
• Stopping distance =braking distance + thinking distance
• Force = Spring constant x extension
• power = current × voltage
• voltage = current × resistance
• charge = current × time
• energy = charge × voltage
• wave speed = frequency × wavelength
• refractive index, n = sin i / sin r
• efficiency = useful energy output / total energy input
• work done = force × distance moved
• gravitational potential energy = mass × g × height
• kinetic energy = 1 2 × mass × velocity2
• energy transferred = work done
• density = mass / volume
• pressure = force / area
• pressure difference = height × density × g
• pressure of a liquid in a column of fluid = height of the column × density of liquid × gravitational field strength.