744_Dynamics 11ed Manual

744_Dynamics 11ed Manual - instant it has rotated 180. If...

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Engineering Mechanics - Dynamics Chapter 21 b 0.1 s 1 = Solution: I AB W g r 2 4 cos θ () 2 W g r 2 2 sin () 2 + = I AB 0.11 lb ft s 2 = ω 2 1 1 I AB 0 t 1 t M 0 e bt d + = 2 87.2 rad s = Problem 21-35 The rectangular plate of mass m p is free to rotate about the y axis because of the bearing supports at A and B . When the plate is balanced in the vertical plane, a bullet of mass m b is fired into it, perpendicular to its surface, with a velocity v . Compute the angular velocity of the plate at the
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Unformatted text preview: instant it has rotated 180. If the bullet strikes corner D with the same velocity v , instead of at C , does the angular velocity remain the same? Why or why not? Given: m p 15 kg = m b 0.003 kg = v 2000 m s = a 150 mm = b 150 mm = g 9.81 m s 2 = Solution: Guesses 2 1 rad s = 3 1 rad s = Given m b va 1 3 m p a 2 2 = 1 2 m p a 2 3 2 2 m p g a 2 + 1 2 m p a 2 3 3 2 m p g a 2 = 742...
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This note was uploaded on 08/16/2011 for the course EGN 3321 taught by Professor Christianfeldt during the Spring '08 term at University of Central Florida.

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