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Get Full Access to University Physics - 13 Edition - Chapter 11 - Problem 98p
Get Full Access to University Physics - 13 Edition - Chapter 11 - Problem 98p

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# Knocking Over a Post. One end of a post weighing 400 N and

ISBN: 9780321675460 31

## Solution for problem 98P Chapter 11

University Physics | 13th Edition

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Problem 98P

Knocking Over a Post. One end of a post weighing 400 N and with height h rests on a rough horizontal surface with µs = 0.30. The upper end is held by a rope fastened to the surface and making an angle of 36.9o with the post (?Fig. P11.90?). A horizontal force is exerted on the post as shown. (a) If the force is applied at the midpoint of the post, what is the largest value it can have without causing the post to slip? (b) How large can the force be without causing the post to slip if its point of application is of the way from the ground to the top of the post? (c) Show that if the point of application of the force is too high, the post cannot be made to slip, no matter how great the force. Find the critical height for the point of application.

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Knocking Over a Post. One end of a post weighing 400 N and