kinetic energy

• What is kinetic energy?

  The energy an object possesses due to its motion
• What two factors determine the amount of kinetic energy an object has?

  Its speed and its mass
• How does speed affect kinetic energy?

  The faster an object is moving, the more kinetic energy it has
• Why do fast-moving objects have more kinetic energy?

  Because they must have had a lot of energy transferred to them to speed up
• How does mass affect kinetic energy when speed is constant?

  The more mass an object has, the more kinetic energy it will have
• 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 much more kinetic energy due to its larger mass
• What is the equation for calculating kinetic energy?

  kinetic energy = 1/2 x mass x speed ^2
• What does the 'E' in the kinetic energy equation stand for?

  Energy
• What does the 'k' in the kinetic energy equation represent?

  Kinetic energy
• What unit is mass measured in for the kinetic energy equation?

  Kilograms
• What unit is velocity measured in for the kinetic energy equation?

  Meters per second
• 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 a plane weighing 20,000 kg traveling at 5 m/s?

  250,000 joules
• What is the kinetic energy of a particle weighing 0.0001 kg traveling at 4,000 m/s?

  800 joules
• Why did the particle have less kinetic energy than the plane despite traveling faster?

  Because its mass was much lower
• What are the key points about kinetic energy?

  • Kinetic energy is due to motion.
  • Depends on speed and mass.
  • Faster objects have more kinetic energy.
  • More mass means more kinetic energy if speed is constant.
  • Kinetic energy formula: $E_k =$$\frac{1}{2} m v^2$