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Unformatted text preview: ME218 Homework 2 Solution Problem1. (a). = represents a purely vertical shot while 2 = represents purely horizontal shot. Hence, we would expect the shot angle to be somewhere in the interval 2 , otherwise the ball will move backward or downward. (b). Let 2 2 9.81 35tan( ) 35 2 ( ) 800[cos( )] y f = + = Then, for 2 2 9.81 0, (0) 35tan(0) 35 2 13.02 800[cos(0)] L f = = + = and for 2 2 9.81 , ( ) 35tan( ) 35 2 2 2 2 800[cos( )] 2 R f = = + At the middle point , 4 m = 2 2 9.81 ( ) 35tan( ) 35 2 6.96 4 4 800[cos( )] 4 f = + = Obviously, the function changes sign at both the left and right subintervals, which means that there will be a solution in each of those subintervals. Even though it is ok if you followed up on just one subinterval, we will give you solutions for each of the subintervals....
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This note was uploaded on 12/14/2011 for the course ME 218 taught by Professor Unknown during the Fall '08 term at University of Texas.
 Fall '08
 Unknown

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