1-What is friction? Give 3 examples from Figure 5.8
2-What causes friction? How does the hockey puck on sandpaper help to explain?
3-Compare and contrast static and sliding friction. How does moving a refrigerator help you to
explain the difference?
4- What 3 factors can influence the amount of friction between two objects? Use Figure 5.10 to
help you explain.
5-What is the effect of putting oil in car engines? What would happen to the engine without the
oil?
6-Friction is not always a negative things. Identify 4 ways that friction is beneficial and useful.
7-Friction always produces .
8-True or False. It is possible to eliminate friction completely from moving parts.
9-Look at the picture of rocks on the bottom of page 122. Answer the question you observe in
between the two sets of rocks and explain your reasoning.
10-If the force squeezing two surfaces together is decreased, the force of dry sliding friction
between the two surfaces will most likely .
11-Suppose a mover is pushing a heavy box to the right across the tile floor. What two pieces of
advice could you give the mover about friction that would help the mover move the box more
easily?
Answers: 2
Physics, 21.06.2019 20:00
When using two-wire cable to feed a 240-v appliance that does not require a neutral wire, you should a. mark both ends of the white wire green. b. use the cable as is. c. use only the black wire. d. mark both ends and any exposed area of the white wire black.
Answers: 1
Physics, 22.06.2019 04:40
Which statement best describes copper? a. it has a low resistance and prevents charges from moving freely. b it has a high resistance and allows charges to move freely. c. it has a high resistance and prevents charges from moving freely. d. it has a low resistance and allows charges to move freely
Answers: 1
Physics, 23.06.2019 00:00
You can melt ice by applying pressure because the solid/liquid line has a slope.
Answers: 3
1-What is friction? Give 3 examples from Figure 5.8
2-What causes friction? How does the hockey puc...
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