kinetic energy

• What is kinetic energy?

  Energy possessed due to motion
• What two factors determine kinetic energy?

  Speed and mass of the object
• How does speed affect kinetic energy?

  Faster objects have more kinetic energy
• How does mass affect kinetic energy when speed is constant?

  More mass results in more kinetic energy
• If a particle weighs 0.1 grams and a plane weighs 20 tons, which has more kinetic energy at the same speed?

  The plane has more kinetic energy
• What happens to kinetic energy if the plane travels at 5 m/s and the particle at 4000 m/s?

  We need to calculate using the equation
• What is the equation for kinetic energy?

  $E_k =$$\frac{1}{2} m v^2$
• What does each symbol in the kinetic energy equation represent?

  E is energy, m is mass, v is velocity
• How do you convert 20 tons to kilograms?

  20 tons equals 20,000 kilograms
• How do you convert 0.1 grams to kilograms?

  0.1 grams equals 0.0001 kilograms
• What is the kinetic energy of the plane traveling at 5 m/s?

  250,000 joules or 250 kilojoules
• What is the kinetic energy of the particle traveling at 4000 m/s?

  800 joules or 0.8 kilojoules
• Why does the particle have less kinetic energy despite its higher speed?

  Its mass is significantly lower
• What are the key points about kinetic energy?

  • Kinetic energy depends on speed and mass
  • Faster objects have more kinetic energy
  • More mass means more kinetic energy at constant speed
  • Kinetic energy formula: $E_k =$$\frac{1}{2} m v^2$
  • Energy measured in joules