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03-03-2008, 03:06 PM
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| can a physics wizard please explain this to me line by line..? ****Start from the 4th line Momentum = mv . Conservation of momentum . m1u1 + m2u2 = m1v1 + m2v2 (0.17)(4) + (0.17)(0) = 0.17(vcos60) + (0.17)(uco30) . vsin60 = usin30 v = ?3/3u (0.68) = 0.17(?3/3cos60)u + 0.17(u)cos30 0.68 = 0.17(?3/6)u + 0.17?3/2u 4 = 2?3/3u u = 2?3 m/s ? 3.5 m/s v = 2 m/s      |
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