199_Physics ProblemsTechnical Physics

# 199_Physics ProblemsTechnical Physics - Chapter 7 P7.32(a...

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Chapter 7 201 P7.32 (a) Wk xk x si f =−= × = 1 2 1 2 1 2 500 5 00 10 0 0 625 22 2 2 af ej .. J Wm vm v m v sfi f =−=− 1 2 1 2 1 2 0 222 so v W m f == = 2 20625 200 0791 ch af . . . ms (b) 1 2 1 2 mv f x W mv ik s f −+ = 0 0 350 2 00 9 80 0 050 0 0 625 1 2 0282 1 2 20282 0531 2 2 = = . ... . . . . a fa fa f bg a f J J k g mv v v f f f FIG. P7.32 P7.33 (a) g g + A cos . 90 0 θ W g = 10 0 9 80 5 00 110 168 2 . c o s kg m s m J di a f (b) fn m g kk k µµ cos Ef m g E int int m J = AA µθ cos . c o s . 500 0400 100 980 184 a f a f a f (c) WF F = A 100 5 00 500 a fa f . J (d) ∆∆ KW E W WE Fg =− = + = other int int J 148 FIG. P7.33 (e) Km v m v fi 1 2 1 2 v K m v =+ = 1 4 8 10 0 150 565 2 2 . m s P7.34 Fm a yy = : n = 70 0 20 0 147 0 .s i n . N N n = 123 N = µ 0300123 369 N (a) r ° = cos . . cos . 70 0 5 00 20 0 329 m J a fa f (b) r ° = cos . cos . 123 5 00 90 0 0 m J a f (c)
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