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Physics Laboratory Experiments

Jerry D. Wilson, Cecilia A. Hernandez-Hall

Chapter 11

(TI/CI) Friction - all with Video Answers

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Chapter Questions

01:28

Problem 1

Is it true that the frictional force is directly proportional to the normal force? Discuss the experimental evidence.

Prabhu Ramji
Prabhu Ramji
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03:16

Problem 2

What is the physical significance of the slope of the graph of friction versus normal force?

Vishal Gupta
Vishal Gupta
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02:50

Problem 3

Is there a clear pattern for the frictional force as the speed of the object increases? (Compare to the pattern observed when increasing the load.) What can be concluded about the effect of the speed? Discuss.

Prabhu Ramji
Prabhu Ramji
Numerade Educator
01:31

Problem 4

Why was it so important that the string connecting the sensor and the object remain horizontal during the experiment? Discuss what would happen if it did not.

Kara Merfeld
Kara Merfeld
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02:16

Problem 5

Refer to step 3 of the Experimental Procedure for Part A, which says, "Set the motorized car for a medium speed, and do not change it during the experiment." Given the results of Part B of the experiment, discuss whether changing the speed would have made a difference in the results of Experiment A. (See your textbook for modern theories of friction between two surfaces.)

Manish Jain
Manish Jain
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