83_Physics ProblemsTechnical Physics

83_Physics ProblemsTechnical Physics - 84 P4.8 Motion in...

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84 Motion in Two Dimensions P4.8 aj = 300 . ± ms 2 ; vi i = 500 . ± ms; ri j i =+ 00 ±± (a) rrv a i j fi i tt t t =+ + = + L N M O Q P 1 2 1 2 22 . ± . ± m vv a i j fi =+= + . ± . ± ej (b) t = 200 . s , j i j f = + 500 200 1 2 3 00 2 00 10 0 6 00 2 .. ± ± . ± . ± af m so x f = 10 0 . m, y f = 600 m j i j v f ff x f y f v = + == += + = 300 200 781 . ± ± . ± . ± . *P4.9 (a) For the x -component of the motion we have xx v t a t fix i x 1 2 2 . 001 0 180 10 1 2 81 0 4 10 1 80 10 10 0 44 10 10 24 10 18 10 71 4 2 14 2 7 2 7 2 14 2 2 14 7 2 . . . mm s m s m 1 .8 10 ms m 1.84 10 m s 0m s 2 2 7 2 7 14 × + × ×+ × = = −× ± × × = −× ± × × e j e j e j e j t We choose the + sign to represent the physical situation t = × × 439 10 549 10 5 10 . . 0 m s s 14 2 . Here yy v t a t fiy i y =++ × × = × −− 1 2 1 2 1 6 10 5 49 10 2 41 10 21 5 1 0 2 4 . s m 2 e j . So, j f 10 0 0 241 . ± . ± mm . (b) a i i j iij ij t =+= × + × × + × 1 80 10 8 10 1 6 10 5 49 10 1 80 10 4 39 10 8 78 10 1 84 10 8 78 10 4 1 5 1 0 755 75 . . ± . . ± . ± . ± .
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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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