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Mechanical EngineeringQ&A Library10-8. 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.Start your trial now! First week only $4.99!*arrow_forward*

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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.