317_Dynamics 11ed Manual

317_Dynamics 11ed Manual - v 1 when it is struck by the...

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Engineering Mechanics - Dynamics Chapter 15 Problem 15-22 The block of weight W has an initial velocity v 1 in the direction shown. If a force F = { f 1 i + f 2 j } acts on the block for time t , determine the final speed of the block. Neglect friction. Given: W 2lb = a 2f t = f 1 0.5 lb = v 1 10 ft s = b 2f t = f 2 0.2 lb = g 32.2 ft s 2 = c 5f t = t 5s = Solution: θ atan b ca = Guesses v 2x 1 ft s = v 2y 1 ft s = Given W g v sin θ () cos θ () f 1 f 2 t + W g v 2x v 2y = v 2x v 2y Find v 2x v 2y , () = v 2x v 2y 34.7 24.4 ft s = v 2x v 2y 42.4 ft s =
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Unformatted text preview: v 1 when it is struck by the racket. If it then travels away at angle from the horizontal and reaches maximum altitude h , measured from the height of the racket, determine the magnitude of the net impulse of the racket on the ball. The ball has mass M . Neglect the weight of the ball during the time the racket strikes the ball. Given: v 1 15 m s = 25 deg = h 10 m = M 180 gm = g 9.81 m s 2 = 315...
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This note was uploaded on 08/16/2011 for the course EGN 3321 taught by Professor Christianfeldt during the Spring '08 term at University of Central Florida.

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