Unformatted text preview: in the direction of the acceleration. Solve: With the rock is sliding up the hill the friction force is down the hill. The freebody diagram is given in Figure 5.84a. Figure 5.84 ( b ) x n y mg sin f mg cos f mg f k f v a ( a ) x n y f k mg sin f mg cos f mg v a 1 x n 5 W m k 5 20 N 0.20 5 100 N. m k n 5 W f k 5 W f 5 f k 5 m k n . a 5 0. 25 N f s 5 m s n 5 1 0.50 21 50 N 2 5 n 5 F 5 50 N. f 5 W 5 20 N. x y w f F n T x 5 W 1 cos 46° 1 cos 37° 2 5 654 N W cos 46° 1 W cos 37° 2 T x 5 g F x 5 T x . W 5 438 N. 51.5 N W 1 sin 46° 2 sin 37° 2 5 W sin 46° 2 W sin 37° 2 T y 5 0. g F y 5 T y 5 51.5 N, T x x y W sin46 ° W cos37 ° W cos46 ° W W W sin37 ° T T y 37 ° 46 ° 534 Chapter 5...
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 Spring '07
 Shoberg
 Force, Friction, Mass, Friction Force, Sin, ty T

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