Energy Study Guide for Review General Science

1. Energy in the form of motion is ______ energy. kinetic

2. The greater ______ a moving object has, the more kinetic energy it has. mass

3. A rock at the edge of a cliff has ______ energy because of its position. potential

4. Friction causes some mechanical energy to change to ________ energy. thermal

5. Energy that is stored is ________ energy. potential

6. _______ is measured in joules. Energy

7. Doubling an object’s velocity will ________ its kinetic energy. quadruple

8. ____________ energy is stored in chemical bonds. Chemical potential energy

9. ___________ energy is energy stored by things that stretch or compress. Elastic potential

10. A book and a feather sitting next to each other on a shelf have ______ potential energies. different

11. Two copies of the same book are in a book case. One book is twice as high as the other. They have _____ potential energy. different

12. A toaster uses ________ energy to make toast. electrical

13. _____ energy is the total amount of potential and kinetic energy in a system. mechanical

14. When a Ford truck falls from a cliff its _________ energy is transformed into kinetic energy. potential

15. The __________ states that although energy can change forms, it can never be created or destroyed. law of conservation of energy

16. Which of the following is not used to calculate kinetic energy? height

17. Which of the following is not used to calculate potential energy? speed

18. Thermal energy is measured in _____. Joules

19. The _________ energy of an object increases with its height. potential

20. The kinetic energy of an object increases as its _________ increases. speed

21. Mechanical energy is the total kinetic and _________energies in a system. potential

22. ______ can cause kinetic energy to change into thermal energy. friction

23. Green plants convert light energy from the sun into ______. chemical potential energy

24. The mechanical energy of a coconut falling from a tree _________. remains constant

25. The law of ____ states that energy in a system can change forms but can never be created or destroyed. conservation of energy

A carpenter lifts a 10kg piece of wood to his shoulder 1.5m above the ground. The then sets the wood on his truck at 1.0m above the ground and makes his deliver going 10m/s. Wood’s potential energy on shoulder? 147J Wood’s potential energy on truck? 98J Wood’s kinetic energy during delivery? 500J If wood drops from shoulder, what is maximum kinetic energy? 147J

A carpenter lifts a 10kg piece of wood to his shoulder 1.5m above the ground. The then sets the wood on his truck at 1.0m above the ground and makes his deliver going 10m/s. Potential energy on shoulder? GPE=mass X 9.8m/s² X height =10kg X 9.8m/s² X 1.5m = 147J

A carpenter lifts a 10kg piece of wood to his shoulder 1.5m above the ground. The then sets the wood on his truck at 1.0m above the ground and makes his deliver going 10m/s. Potential energy on truck? GPE=mass X 9.8m/s² X height =10kg X 9.8m/s² X height = 98J

A carpenter lifts a 10kg piece of wood to his shoulder 1.5m above the ground. The then sets the wood on his truck at 1.0m above the ground and makes his deliver going 10m/s. Kinetic energy on delivery? KE = ½ mass X velocity² = ½ X 10kg X (10m/s²) =500J

A carpenter lifts a 10kg piece of wood to his shoulder 1.5m above the ground. The then sets the wood on his truck at 1.0m above the ground and makes his deliver going 10m/s. Drops from carpenter’s shoulders? The maximum kinetic energy would equal the wood’s gravitational potential energy on the carpenter’s shoulder (Law of conservation of energy)