Name______

  1. Two books with different masses fall off the same bookshelf. As they fall which has more kinetic energy and why? ______
  2. How can the gravitational potential energy of an object be changed? ______
  3. How is energy stored in food? ______is the form of energy stored in food different from the form of energy stored in gasoline? ______explain ______
  4. Contrast potential and kinetic energy. ______
  5. Which ball as the greatest potential energy? ______the least ______
  6. A dump truck, a sports car, and a bicycle are traveling at the same velocity. Compare their kinetic energies. ______
  7. The only way Ms. Stayner’s 12 year old Honda can go more than 52 mph is to roll down a mountain. If the Honda has a mass of 1300 kg and its velocity is 45 m/s, what is its kinetic energy?

given / work / answer
  1. Your physical science textbook is dusty and on a shelf 3 m from the floor. It is sad that you don’t spend quality time with it. If its mass is 1.25 kg, what is its gravitational potential energy? Would the GPE be more or less if the same book were on a shelf 4 m from the ground?

given / work / answer
  1. Explain mechanical energy and describe the mechanical energy of a roller coaster car immediately before it begins traveling down a long track. ______
  2. What is the law of conservation of energy? ______
  3. Applying bicycle brakes as you ride down a long hill causes the brake pads and wheel rims to feel warm. Explain. ______
  4. Where do nuclear fusion and fission reactions occur naturally? ______
  5. How is mass converted into energy in nuclear fission? ______
  6. Riley runs the bases with a blazing velocity of 1 .3 m/s with a massive mass of 18 kg. What is his kinetic energy?

given / work / answer
  1. Your mom wants you to clean your room which includes doing your yearly dusting. I know it has been since last year that you looked on top of your bookcase. As you climb the 4.25 m to get a look at the top you find the Mt. Dew that you hid from your little brother. The soda, can, and growth of mold combine to .78 kg. What is its GPE?

given / work / answer

Lesson 1 Summary

  1. Energy in an object means it has the ability to cause ______.
  2. Energy in the form of motion ______energy. Increases as velocity increases.
  3. Energy that is stored is called ______
  4. The formula for kinetic energy ______
  5. The formula for gravitational energy ______
  6. If you increase the speed of an object you ______its potential energy.
  7. The SI unit for energy. ______

Lesson 2 Summary

  1. A truck engine transfers chemical potential energy into ______energy so the truck moves.
  2. Anytime you move a hand or foot your body has converted potential energy into ______energy. (the energy of movement)
  3. When swinging your kinetic and potential energies change but your ______energy does NOT.
  4. The Law of Conservation of Energy. ______
  5. During Nuclear fusion energy is transformed from mass into ______.