ch09-p135 - v com → = m 1 v 1 → m 2 v 2 → m 3 v 3 →...

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135. We use Eq. 9-5. (a) The x coordinate of the center of mass is x com = m 1 x 1 + m 2 x 2 + m 3 x 3 + m 4 x 4 m 1 + m 2 + m 3 + m 4 = 0 + (4)(3) + 0 + (12)(-1) m 1 + m 2 + m 3 + m 4 = 0. (b) The y coordinate of the center of mass is y com = m 1 y 1 + m 2 y 2 + m 3 y 3 + m 4 y 4 m 1 + m 2 + m 3 + m 4 = (2)(3) + 0 + (3)(-2) + 0 m 1 + m 2 + m 3 + m 4 = 0 . (c) We now use Eq. 9-17:
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Unformatted text preview: v com → = m 1 v 1 → + m 2 v 2 → + m 3 v 3 → + m 4 v 4 → m 1 + m 2 + m 3 + m 4 = (2)(–9j ^ ) + (4)(6i ^ ) +(3)(6j ^ ) +(12)(–2i ^ ) m 1 + m 2 + m 3 + m 4 = 0 ....
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This note was uploaded on 05/17/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.

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