256_Physics ProblemsTechnical Physics

256_Physics ProblemsTechnical Physics - 258 P9.17 Linear...

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258 Linear Momentum and Collisions P9.17 Momentum is conserved 10 0 10 5 01 0 600 301 3 .. . ×= = kg kg m s ms ej bg b g v v P9.18 (a) mv mv mv ii f 12 34 += where m 250 10 4 . k g v f = + = 400 3 200 4 250 . af (b) K K mv fi f i i −= + L N M O Q P × 1 2 4 1 2 1 2 3 2 50 10 12 5 8 00 6 00 3 75 10 2 1 2 2 24 4 . . . J P9.19 (a) The internal forces exerted by the actor do not change the total momentum of the system of the four cars and the movie actor 43 2 0 0 4 0 0 600 400 4 m m v i i a f a f =+ = + = . FIG. P9.19 (b) WK K m m actor m =− = + 1 2 32 0 0 4 0 0 1 2 42 5 0 22 2 . W actor kg k J = × +− = 2 12 0 16 0 25 0 37 5 4 2 . ... . (c) The event considered here is the time reversal of the perfectly inelastic collision in the previous problem. The same momentum conservation equation describes both processes.
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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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