College Physics
5th Edition
ISBN: 9781260486841
Author: GIAMBATTISTA, Alan
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Chapter 7, Problem 1CQ
(a)
To determine
The result happened for the given situation.
(a)
Expert Solution
Answer to Problem 1CQ
The person break legs when the person jump from the second story balcony to pavement below.
Explanation of Solution
The person trapped on the second floor of a burning building. There is a balcony outside the window. If the person jump from the balcony to the pavement below, landing stiff-legged on feet.
Landing stiff-legged means the person come to a stop in a very short amount of time. According to the impulse momentum theorem, the person will experience a high impulse, hence high average force. So the legs of the person will break. As a result a large force acts on person to cause injury.
Conclusion:
Therefore, the person break legs when the person jump from the second story balcony to pavement below.
(b)
To determine
The result happened for the given situation.
(b)
Expert Solution
Answer to Problem 1CQ
If the person jump into a privet hedge, landing on persons back and rolling to your feet. Then there is less chance to breaking something.
Explanation of Solution
If the person jump into a privet hedge, landing on persons back and rolling to your feet. It increase the time interval during which the person decelerate. Thus the impulse is lower and hence the average force on the person also lower. Hence there is less chance of breaking something.
Conclusion:
Thus, if the person jump into a privet hedge, landing on persons back and rolling to your feet. Then there is less chance to breaking something.
(c)
To determine
The result happened for the given situation.
(c)
Expert Solution
Answer to Problem 1CQ
If the person jump into a fire fighters net, and landing on back. The net will down over a couple of seconds.
Explanation of Solution
If the person jump into a fire fighters net, and landing on back. It is the best option to avoid dangerous situation. The net is designed to slow the person down over s couple of seconds rather than a fraction of a seconds. So the impulse experienced on the person is low, hence the average force on the person is also lowest.
Conclusion:
Thus, if the person jump into a fire fighters net, and landing on back. The net will down over a couple of seconds.
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Chapter 7 Solutions
College Physics
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