7. Friction, Inclines, Systems

Kinetic Friction

Multiple Choice
In the context of kinetic friction between two solid surfaces, which method will most directly reduce the kinetic frictional force $f_{k}$ for a given normal force $N$ ?
Multiple Choice
Which type of road surface would exert the least amount of $F$ _k (kinetic friction) on a car's tires as it moves at constant speed?
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Multiple Choice
Which of the following factors can affect the amount of kinetic friction acting on an object moving on a solid surface?
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Multiple Choice
Which of the following correctly identifies the three main types of friction and the situations in which each applies?
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Multiple Choice
Which of the following lists correctly identifies the four main types of friction encountered in physics?
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Multiple Choice
How does $k i n e t i c f r i c t i o n$ affect the motion of a roller coaster as it moves along the track?
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Multiple Choice
Which of the following conditions reduces traction even more than rain when driving on a road surface?
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Multiple Choice
In the context of kinetic friction between two sliding solid surfaces, which method is most likely to reduce the kinetic friction force?
Multiple Choice
Which of the following may result from an increase in kinetic friction between two surfaces?
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Multiple Choice
Why does a moving object come to a stop when it moves across a surface with kinetic friction?
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Multiple Choice
In the context of kinetic friction, in which direction does the frictional force act relative to the motion of an object?
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Multiple Choice
Why does an object that is sliding across carpet slow down?
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Multiple Choice
Which of the following correctly identifies the two main types of friction encountered in physics?
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Multiple Choice
When a block slides across a horizontal surface, how does kinetic friction affect its speed over time?
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Multiple Choice
Which one of the following is an example of kinetic friction?
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