problem02_80 solution

# University Physics with Modern Physics with Mastering Physics (11th Edition)

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2.80: If the speed of the flowerpot at the top of the window is v 0 , height h of the window is . ) 2 1 ( or , ) 2 1 ( 0 2 0 ave gt t h v gt t v t v h - = + = = The distance l from the roof to the top of the window is then . m 310 . 0 ) s m 80 . 9 ( 2 )) s 420 . 0 )( s m 80 . 9 )( 2 1 ( ) s 420 . 0 /( ) m 90 . 1 (( 2 2 2 2 2 0 = - = = g v l An alternative but more complicated algebraic method is to note that t is the difference between the times taken to fall the heights l
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Unformatted text preview: h and h , so that . 2 , 2 ) ( 2 2 h l l gt g l g h l t + = +-+ = Squaring the second expression allows cancelation of the l terms, , 2 2 ) 2 1 ( 2 2 h l gt gt = + which is solved for , ) 2 1 ( 2 1 2 -= gt t h g l which is the same as the previous expression....
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• Algebra, The Times, complicated algebraic method

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