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Physics / University Physics 13 / Chapter 5 / Problem 12DQ

University Physics | 13th Edition | ISBN: 9780321675460 | Authors: Hugh D. Young, Roger A. Freedman

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In a world without friction, which of the following

Chapter 8, Problem 12DQ

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QUESTION:

In a world without friction, which of the following activities could you do (or not do)? Explain your reasoning. (a) Drive around an unbanked highway curve; (b) jump into the air; (c) start walking on a horizontal sidewalk; (d) climb a vertical ladder; (e) change lanes while you drive.

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QUESTION:

In a world without friction, which of the following activities could you do (or not do)? Explain your reasoning. (a) Drive around an unbanked highway curve; (b) jump into the air; (c) start walking on a horizontal sidewalk; (d) climb a vertical ladder; (e) change lanes while you drive.

ANSWER:

Solution 12DQ a) Drive around an unbanked highway curve: You can’t drive through the unbanked highway as there is no friction. Friction also provides the normal reaction, otherwise you would not be able t stand on a train as it is moving. Here the normal reaction is by the friction which holds you. Without friction, any type of motion which includes contact of two objects can’t be done. b) jump into the air: You can jump into air any time.

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