10-8. The bar AB in Fig. P 10-8 weighs 100 lb and rotates in a vertical plane about a horizontal axis through A. When the bar is in the position indicated, the tension in the spring is 20 lb. As the bar rotates 90° clockwise the work done on it is -100 ft-lb. Determine the modulus of the spring.

10-8. The bar AB in Fig. P 10-8 weighs 100 lb and rotates in a vertical plane about a horizontal axis through A. When the bar is in the position indicated, the tension in the spring is 20 lb. As the bar rotates 90° clockwise the work done on it is -100 ft-lb. Determine the modulus of the spring.

Mechanics of Materials (MindTap Course List)

9th Edition

ISBN:9781337093347

Author:Barry J. Goodno, James M. Gere

Publisher:Barry J. Goodno, James M. Gere

Chapter5: Stresses In Beams (basic Topics)

Section: Chapter Questions

Problem 5.8.1P: The shear stresses t in a rectangular beam arc given by Eq. (5-43): in which Fis the shear force, /...

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Question

10-8. The bar AB in Fig. P 10-8 weighs 100 lb and rotates in a vertical plane
about a horizontal axis through A. When the bar is in the position indicated, the
tension in the spring is 20 lb. As the bar rotates 90° clockwise the work done on
it is -100 ft-lb. Determine the modulus of the spring.

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