259_Physics ProblemsTechnical Physics

259_Physics ProblemsTechnical Physics - Chapter 9 *P9.27...

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Chapter 9 261 *P9.27 (a) Using conservation of momentum, pp ∑∑ = ch after before , gives 40 10 30 40 50 10 30 .. . . . ++ = + + af bg b g b g b g b g kg kg m s kg m s kg m s v . Therefore, v =+ 224 . m s , or . m s toward the right . (b) No . For example, if the 10-kg and 3.0-kg mass were to stick together first, they would move with a speed given by solving 13 10 3 0 3 0 4 0 1 kg kg m s kg m s b g b g b g v . . . , or v 1 138 . m s . Then when this 13 kg combined mass collides with the 4.0 kg mass, we have 17 13 1 38 4 0 5 0 kg kg m s kg m s b g b g b g v . . . , and v m s just as in part (a). Coupling order makes no difference. Section 9.4 Two-Dimensional Collisions P9.28 (a) First, we conserve momentum for the system of two football players in the x direction (the direction of travel of the fullback). 90 0 5 00 0 185 c o s kg m s kg b g b g += V θ where is the angle between the direction of the final velocity
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This note was uploaded on 12/14/2011 for the course PHY 203 taught by Professor Staff during the Fall '11 term at Indiana State University .

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