energy study guide for review general science. 1. energy in the form of motion is ______ energy....
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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? 147JWood’s potential energy on truck? 98JWood’s kinetic energy during delivery? 500JIf wood drops from shoulder, what is maximum kinetic energy? 147J
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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)