Mallory's Physical Science Class Los Angeles Mission College ... 12. Which has
more kinetic energy: a 0.0020-kg bullet traveling at 400 m/s or a ... Since the
potential energy will be zero at ground level and using the answer from question
13,.
Initially, Kenny's mother persisted in her story that Kenny had fallen from his ....
Slapping, spanking, paddling, and, generally hitting children for purposes of .....
There were fewer teen pregnancies, teen suicides, and children living in po
Aug 30, 2013 ... (Unit Conversion) Worksheet ... Convert the following quantities using
Dimensional Analysis and ... Multiply and Divide to get the answer.
PHYSICS CHAPTER 5 SECTION 2 Worksheet 1. Name ... A net force of 10
Newton's is applied tangentially to the rim of a wheel having a .25 meter radius.
AP Chapter 13 Worksheet 4 Arrays continued page 4 of 8. II. Refer to the
following classes for Questions #5-7. public class Ticket. { private String myRow;.
Animal Farm. Chapter One Review. Summarize Old Major's Dream: In his dream,
Old Major criticizes humans. What are three reasons that he doesn't like man?
Identify the letter of the choice that best completes the statement or answers the
.... g. energy of motion d. Mechanical Advantage h. efficiency. ____ 24. Energy.
Worksheet 1. Period________________________. Match the definition to the
correct word or phrase. ____ 1. Power. A. Machine that does work with only one ...
Physical Science Chapter 4 Worksheet 1
Name ________________________ Period________________________
Match the definition to the correct word or phrase ____
1. Power
A. Machine that does work with only one movement
____
2. Compound machine
____
3. System
B. Energy that is stored due to the interactions between objects C. States that energy cannot be created or destroyed
____
4. Efficiency
____
5. Elastic potential energy
D. A region or set of regions around which a boundary can be defined E. The ability to cause change
____
6. Mechanical energy
F. A device that makes doing work easier
____
7. Machine
G. Ratio of the output force exerted by a machine to the input force applied to the machine
____
8. Potential energy
H. Machine that is a combination or two or more simple machines
____
9. Work
I.
Energy that is due to the gravitational force between objects
____
10. Chemical potential energy
J.
Sum of the potential energy and kinetic energy of the objects in a system
____
11. Mechanical advantage
K. Energy that is due to chemical bonds
____
12. Law of conservation of energy
L. Rate at which energy is converted
____
13. Kinetic energy
____
14. Gravitational potential energy
M. Energy that is stored by compressing or stretching an object N. Energy a moving object has because of its motion
____
15. Simple machine
____
16. Energy
O. Transfer of energy when a force is applied over a distance P. Ratio of the output work done by the machine to the input work done on the machine
Circle the letter that corresponds to the correct answer 17. Using the scientific definition, which statement is always true of work? a. It is difficult b. It involves levers c. It involves a transfer of energy d. It is done with a machine 18. The gravitational potential energy of a cucumber-Earth system changes when which factor changes? a. The cucumber’s speed b. The cucumber’s mass c. The cucumber’s temperature d. The cucumber’s length
19. Which cannot be done by a machine? a. Increase force b. Increase work c. Change direction of a force d. Increase velocity 20. Which factor increases as the efficiency of a machine increases? a. Work input b. Work output c. Friction d. Input force 21. Friction causes mechanical energy to be converted into which form? a. Thermal energy b. Nuclear energy c. Kinetic energy d. Potential energy 22. What term indicates the number of times a machine multiplies the input force? a. Efficiency b. Power c. Mechanical advantage d. Resistance 23. What energy transformations occur when a lump of clay is dropped? a. GPE→KE→thermal energy b. KE→chem PE→thermal energy c. KE→GPE→thermal energy d. GPE→KE→elastic PE 24 Suppose a juggler is juggling oranges. At an orange's highest point, what form of energy does it have? a. mostly potential energy b. mostly kinetic energy c. no potential or kinetic energy d. equal amounts of both 25. The gravitational potential energy of an object depends on which of the following? a. velocity and height b. velocity and weight c. weight and height d. weight and acceleration 26. Which idea is central to the law of conservation of energy? a. Friction produces thermal energy b. People must conserve energy c. The total amount of energy is constant d. Energy is the ability to cause change 27. To what property of an object is kinetic energy directly related? a. volume b. height c. position d. mass
The six simple machines are: the lever, wheel and axle, the pulley, the ramp, the wedge, and the screw. Classify each of the machines in the list below. 28. 29. 30. 31. 32. 33. 34. 35.
Knife Wheel barrow Ramp Screwdriver Block and tackle Door knob Saw Steering wheel
Circle T if the statement is true or F if the statement is false T T T
F F F
36. Energy is the ability to cause change and can take different forms 37. Kinetic energy is the energy stored in an object due to its position 38. The Law of conservation of Energy states that the total amount of energy in the universe always stays the same
T T
F F
39. Because of friction energy is not conserved. 40. The faster an object moves the greater its kinetic energy
T
F
T T
F F
41. A snowboarder at the top of Terry Peak has more potential energy than a snowboarder at the top of Lookout Mountain. 42. Mechanical energy is equal to the total kinetic energy in a system. 43. Energy stored in chemical bonds is called gravitational potential energy.
