Kinetic energy

• What is kinetic energy?

  Energy stored in moving objects
• Why does a stationary object have no kinetic energy?

  Because it is not moving
• What is the formula for calculating kinetic energy?

  Kinetic energy = 0.5 * mass * speed²
• What unit is speed measured in for the kinetic energy formula?

  Metres per second
• How do scientists often convert Joules into kilojoules?

  By dividing by 1,000
• How do you rearrange the kinetic energy equation to find mass?

  Mass = kinetic energy / (0.5 * speed²)
• What are the energy changes in a car's engine?

  • Chemical energy from petrol
  • Converted to kinetic energy as the car moves
• What steps should you follow to calculate kinetic energy?

  1. Identify mass in kg
  2. Identify speed in m/s
  3. Use the formula: KE = 0.5 * mass * speed²