Equations

• Speed (m/s) = distance (m) / time (s)
• acceleration (m/s²) = change in velocity (m/s) ÷ time (s)
• Weight (N) = Mass (kg) x Gravity (N/kg)
• Change in GPE (J) = mass (kg) x gravitational field strength (N/kg) x change in height (m)
• Kinetic Energy (J) = ½ x mass (kg) x speed² (m/s)
• Efficiency = useful energy output ÷ total energy input x 100