139_Physics ProblemsTechnical Physics

139_Physics ProblemsTechnical Physics - Chapter 5 *P5.50 We...

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Chapter 5 141 *P5.50 We must consider separately the disk when it is in contact with the roof and when it has gone over the top into free fall. In the first case, we take x and y as parallel and perpendicular to the surface of the roof: Fm a nm g nm g yy =+ = = :c o s cos θ 0 then friction is fn m g kk k == μμ cos FIG. P5.50 F ma f mg ma agg xxk x xk =− = = − °− ° :s i n cos sin . cos sin . . µθ 0 4 37 37 9 8 9 03 af ms 22 The Frisbee goes ballistic with speed given by vv a x x v xf xi x f i xf 2 21 5 2 9 0 3 1 0 0 4 4 4 667 −= + = = di bg ej m s m s m m s 2 .. . For the free fall, we take x and y horizontal and vertical: a y y y y yf yi y f i f f 2 2 2 0 6 67 37 2 9 8 10 37 602 401 19 6 684 + ° = . sin . sin . . . . m s m s m m m 2 2 Additional Problems P5.51 (a) see figure to the right
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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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