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# (a) What minimum coefficient of friction is needed between ISBN: 9780130606204 3

## Solution for problem 15PE Chapter 9

Physics: Principles with Applications | 6th Edition

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Problem 15PE

(a) What minimum coefficient of friction is needed between the legs and the ground to keep the sign in Figure 9.35 in the position shown if the chain breaks? (b) What force is exerted by each side on the hinge?

Step-by-Step Solution:

Solution 15PE Step-by-step solution Step 1 o f 10 From the first condition of equilibrium net force acting on system is zero. The first condition for equilibrium gives, From the second condition of equilibrium net torque acting on system is zero. The second condition for equilibrium gives, Step 2 o f 10 The three forces acted on the entire sandwich board system are w eight of the sign w, acted down at the center of mass of the system, normal reaction force on right and left leg respectively acted up at the ground for each of the legs. The tension and the hinge exert internal forces, and therefore cancel when considering the entire sandwich board. From the first condition for equilibrium, By symmetry, the normal forces are equal. So, Here, m is the mass of the sign board and g is the acceleration due to gravity. Substitute 8.00 kg for m and for g . Step 3 o f 10 The tension on each leg is 39.2 N. But the total tension is equal to weight entire sign board 78.4 N.

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##### ISBN: 9780130606204

The full step-by-step solution to problem: 15PE from chapter: 9 was answered by , our top Physics solution expert on 03/03/17, 03:53PM. Physics: Principles with Applications was written by and is associated to the ISBN: 9780130606204. This textbook survival guide was created for the textbook: Physics: Principles with Applications, edition: 6. Since the solution to 15PE from 9 chapter was answered, more than 291 students have viewed the full step-by-step answer. This full solution covers the following key subjects: breaks, Chain, coefficient, exerted, figure. This expansive textbook survival guide covers 35 chapters, and 3914 solutions. The answer to “(a) What minimum coefficient of friction is needed between the legs and the ground to keep the sign in Figure 9.35 in the position shown if the chain breaks? (b) What force is exerted by each side on the hinge?” is broken down into a number of easy to follow steps, and 40 words.

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