Equations needed for 4th form exam

• average speed = distance / time
• force = mass x acceleration
• acceleration = change in velocity / time taken
• momentum = mass x velocity
• density = mass / volume
• work done = force x distance moved
• energy transferred = work done
• kinetic energy = 1/2 x mass x speed squared
• gravitational potential energy = mass x g x height
• weight = mass x gravitational field strength
• pressure = force / area
• moment = force x distance from pivot
• charge = current x time
• voltage = current x resistance
• electrical power = voltage x current
• wave speed = frequency x wavelength
• efficiency = useful energy output / total energy input x 100
• pressure difference = height x density x gravitational field strength