ww E L Vo B A bullet weighing 0.08 lb is fired with a horizontal velocity of 1800 ft/s into the lower end of a slender 1

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Ww E L Vo B A Bullet Weighing 0 08 Lb Is Fired With A Horizontal Velocity Of 1800 Ft S Into The Lower End Of A Slender 1 1 (156.68 KiB) Viewed 49 times

ww E L Vo B A bullet weighing 0.08 lb is fired with a horizontal velocity of 1800 ft/s into the lower end of a slender 15-lb bar of length L = 30 in. The slender bar is attached at E to an initially unstretched spring of constant k= 40 lb/ft as shown. Knowing that h=10 in and d=25in. and that the bar is initially at rest. Using the impulse - Momentum principle, determine: (a) the angular velocity of the bar immediately after the bullet becomes embedded. (b) the impulsive reaction at C Assuming that the bullet becomes embedded in 0.001s and the stretch distance of the spring is 2 in immediately after impact of the bullet.