1. In the figure, two blocks are separated by a uniform strut attached to each block with frictionless pins. Block A weighs 400 lb, block B weighs 300 lb, and the strut AB weighs 200 lb. If µs 0.25 under B, determine the minimum coefficient of friction under A to prevent motion.

1. In the figure, two blocks are separated by a uniform strut attached to each block with frictionless pins. Block A weighs 400 lb, block B weighs 300 lb, and the strut AB weighs 200 lb. If µs 0.25 under B, determine the minimum coefficient of friction under A to prevent motion.

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter7: Dry Friction

Section: Chapter Questions

Problem 7.49P

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Question

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1. In the figure, two blocks are separated by a uniform strut attached to each block with
frictionless pins. Block A weighs 400 lb, block B weighs 300 lb, and the strut AB weighs
200 lb. If us = 0.25 under B, determine the minimum coefficient of friction under A to
prevent motion.
| 30°
A
60°

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