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Engineering Mechanics: Statics | 14th Edition | ISBN: 9780133918922 | Authors: Russell C. Hibbeler
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Answer: The mine car and its contents have a total mass of

Chapter 8, Problem 8-3

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QUESTION:

The mine car and its contents have a total mass of 6 Mg and a center of gravity at G. If the coefficient of static friction between the wheels and the tracks is \(\mu_{\mathrm{s}}=0.4\) when the wheels are locked, find the normal force acting on the front wheels at B and the rear wheels at A when the brakes at both A and B are locked. Does the car move?

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QUESTION:

The mine car and its contents have a total mass of 6 Mg and a center of gravity at G. If the coefficient of static friction between the wheels and the tracks is \(\mu_{\mathrm{s}}=0.4\) when the wheels are locked, find the normal force acting on the front wheels at B and the rear wheels at A when the brakes at both A and B are locked. Does the car move?

ANSWER:

Step 1 of 2

Equation of equilibrium

The normal reactions acting on the wheels at ( and  ) are independent as to whether the wheels are locked or not. Hence, the normal reaction acting on the wheels are the same for both cases.

Free body diagram

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