97_Physics ProblemsTechnical Physics

# 97_Physics ProblemsTechnical Physics - 98 Motion in Two...

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98 Motion in Two Dimensions Section 4.6 Relative Velocity and Relative Acceleration P4.38 (a) v a i j v i j v a i j v i j v i j i j v i j v H H 2 H J 2 J HJ H J HJ HJ + . . m s . s . . m s + . + . m s . s . + . m s . . . . m s . . m s m s = = = = = = = = = = + = 0 3 00 2 00 5 00 15 0 10 0 0 1 00 3 00 5 00 5 00 15 0 15 0 10 0 5 00 15 0 10 0 25 0 10 0 25 0 26 2 2 t t v v j ± ± ± ± ± ± ± ± ± ± ± ± ± ± ( . ) ( . ) e j a f e j e j a f e j e j e j .9 m s (b) r a i j r i j r i j i j r r r i j i j r i j r H H 2 2 H J 2 HJ H J HJ HJ m s 5.00 s . . m m s 5.00s m . . . . m . . m m m = + + = = = + = + = = = = + = 0 0 1 2 1 2 3 00 2 00 37 5 25 0 1 2 1 00 3 00 12 5 37 5 37 5 25 0 12 5 37 5 25 0 62 5 25 0 62 5 67 3 2 2 2 2 t . ± . ± ± ± . ± . ± . ± . ± ± ± ± ± ± ± . . . e j a f e j e j a f e j e j e j a f a f (c) a a a i j i j a i j HJ H J 2 HJ 2 . . . . m s m s = = = 3 00 2 00 1 00 3 00 2 00 5 00 ± ± ± ± . ± . ± e j e j *P4.39 v ce = the velocity of the car relative to the earth. v wc = the velocity of the water relative to the car. v we
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