Calculations

• weight = mass x gravitational field strength
• work done = force x distance along the line of action of the force
• force applied to a spring = spring constant x extension
• pressure = force divided by area
• distance = speed x time
• acceleration = change in velocity divided by time
• kinetic energy = 0.5 x mass x (speed) squared
• gravitational potential energy = mass x gravitational field strength x height
• power = energy divided by time
• energy = power x time
• density = mass divided by volume
• Constant = pressure x volume
• power = voltage x current
• energy to change state = mass x SLH
• Efficiency = useful energy output divided by total energy input
• cost of energy = units used x price of unit