problem10_85

# University Physics with Modern Physics with Mastering Physics (11th Edition)

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10.85: The speed of the ball just before it hits the bar is s. m 34 . 15 2 = = gy v Use conservation of angular momentum to find the angular velocity ϖ of the bar just after the collision. Take the axis at the center of the bar. ( 29 ( 29 ( 29 2 1 m kg 153.4 m 00 . 2 s m 15.34 kg 5.00 = = = mvr L Immediately after the collsion the bar and both balls are rotating together. ω I L tot 2 = ( 29 ( 29 ( 29 ( 29 2 2 2 2 2 tot m kg 67 . 50 m 00 . 2 kg 00 . 5 2 m 00
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Unformatted text preview: . 4 kg 00 . 8 12 1 2 12 1 ⋅ = + = + = mr Ml I 2 1 2 m kg 4 . 153 ⋅ = = L L s rad 027 . 3 tot 2 = = I L ω Just after the collision the second ball has linear speed ( 29 ( 29 s m 055 . 6 s rad 027 . 3 m 00 . 2 = = = rw v and is moving upward. m 1.87 y gives 2 1 2 = = mgy mv for the height the second ball goes....
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