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 18:20
An input force of 7 n is applied to a machine with a mechanical advantage of 1.75. what is the maximum the machine could lift? 12.25 n7n7.25 n26.2 n
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Athin plate moves between two parallel, horizontal, stationary flat surfaces at a constant velocity of v = 7.5 m/s. the two stationary surfaces are spaced 4 cm apart, and the medium between them is filled with oil whose viscosity is 0.9 nยทs/m2. the part of the plate immersed in oil at any given time is 2 m long and 0.5 m wide. if the plate moves through the mid-plane between the surfaces, determine the force required to maintain this motion. what would your response be if the plate was 1 cm from the bottom surface (h2) and 3 cm from the top surface (h1)? if the plate moves through the mid-plane between the surfaces, the force required to maintain the motion will be n. if the plate was 1 cm from the bottom surface (h2) and 3 cm from the top (h1) surface, the force required to maintain the motion would be n.
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Physics, 22.06.2019 16:00
What is the measure of how much matter is in an object and that can be measured using a balance? a. height b. volume c. weight d. mass
Answers: 1
Physics, 22.06.2019 17:30
Frequency of electromagnetic waves that a radio station is assigned is called
Answers: 1
1-What is friction? Give 3 examples from Figure 5.8
2-What causes friction? How does the hockey puc...
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