144_Physics ProblemsTechnical Physics

144_Physics ProblemsTechnical Physics - 146 P5.58 The Laws...

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146 The Laws of Motion P5.58 (a) Following the in-chapter Example about a block on a frictionless incline, we have ag == ° sin . sin . θ 980 300 ms 2 ch a = 490 . m s 2 (b) The block slides distance x on the incline, with sin . . 30 0 0500 °= m x x = 100 . m : vv a xx fi 22 20 2 4 9 0 1 0 0 =+ ( ) c h .. ±ms ±m 2 v f = 313 . m s after time t x v s f f () = 2 2100 0639 . . . m s. (c) Now in free fall yyv t a t fiy i y 1 2 2 : −= ° +− = = −± 2 00 3 13 30 0 1 2 156 200 0 1 56 1 56 4 4 90 2 00 2 2 2 ..s i n . . . . m 2 2 2 2 bg ej af tt
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