27_Physics ProblemsTechnical Physics

27_Physics ProblemsTechnical Physics - 28 P2.16 Motion in...

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28 Motion in One Dimension P2.16 (a) At t = 200 . s , x =( ) () + = 300200 200200 300 110 2 .. . . m m . At t = s , x =− + = 300900 200300 300 240 2 . . af m so v x t == = 24 0 11 0 13 0 . . m 3.00 s s ms . (b) At all times the instantaneous velocity is v d dt tt t = += 600 2 . ch ms At t = s , v ) = 600200 100 . . At t = s , v ) = 600300 160 . . (c) a v t = 16 0 10 0 . s s 2 (d) At all times a d dt = = 600 200 . m s 2 . (This includes both t = . s and t = s ) . P2.17 (a) a v t = 800 13 . . . s 2 (b) Maximum positive acceleration is at t = 3 s, and is approximately 2 m s 2 . (c) a = 0 , at t = 6 s , and also for
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