65_Dynamics 11ed Manual - Engineering Mechanics - Dynamics...

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Engineering Mechanics - Dynamics Chapter 12 Solution: After time t , xv 0 cos θ () t = t x v 0 cos = yv 0 sin t 1 2 gt 2 = yx tan gx 2 2 v 0 2 cos 2 = Set y = 0 to determine the range, x = R : R 2 v 0 2 sin cos g = v 0 2 sin 2 g = R max occurs when sin 2 1 = or, 45deg = This gives: R max v 0 2 g = Q.E.D Problem 12-82 The balloon A is ascending at rate v A and is being carried horizontally by the wind at v w . If a ballast bag is dropped from the balloon when the balloon is at height h , determine the time needed for it to strike the ground. Assume that the bag was released from the balloon with
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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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