42_Physics ProblemsTechnical Physics

42_Physics ProblemsTechnical Physics - Chapter 2 P2.54 (a)...

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Chapter 2 43 P2.54 (a) See the graphs at the right. Choose x = 0 at t = 0. At t = 3 s, x =( ) = 1 2 83 1 2 ms s m a f . At t = 5 s, x =+ ( ) = 12 8 2 28 m m s s m af . At t = 7 s, x ( ) = 28 1 2 82 3 6 m s s m a f . (b) For 0 3 << t s, a == 8 3 267 ms s 2 .. For 35 t a = 0 . (c) For 59 s s t , a = = 16 4 4 s ±ms 2 . (d) At t = 6 s, x ( ) = 28 6 1 34 m s s m . (e) At t = 9 s, x () = 36 1 2 822 8 m s s m . FIG. P2.54 P2.55 (a) a dv dt d dt tt ×+ × 5 00 10 3 00 10 72 5 at = × 10 0 10 3 00 10 75 32 ch Take x i = 0 at t = 0. Then v dx dt = xv d t t t d t x xtt −= = − × + × =− × + × × + × zz 0 5 00 10 3 00 10 500 10 3 300 10 2 1 67 10 1 50 10 0 5 0 7 3 5 2 73 52 . ej (b) The bullet escapes when a = 0 , at × = 10 0 10 3 00 10 0 t t = × × 5 3 . . s 10.0 10 s 7 . (c) New v = ×× + −−
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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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