3a - Solution: m g T T 30 m First, find : tan = 0.3/15 ! =...

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PHY2053 – Section 7392 Quiz #3 Friday, January 30, 2004 Name_______________________________ UFID___________________ Please read the problem carefully and be sure to show all of your work. Partial credit will be given. The distance between two telephone poles is 30.0 m. A 3 kg bird lands on the telephone wire exactly midway between the poles and causes the wire to sag downward by 0.300 m How much tension does the bird produce on the wire?
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Unformatted text preview: Solution: m g T T 30 m First, find : tan = 0.3/15 ! = 1.145 Now, since wire is in equilibrium, the vertical and horizontal forces must sum to zero vectorially. In the vertical direction: 2 T y = m g ! T y = (m g)/2 = (3.0)(9.8)/2 = 14.7 N but T y = T sin ! T = T y / sin 1.145 = 735.6 N Each side of the wire has 735.6 N....
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This note was uploaded on 09/25/2011 for the course PHY 2053 taught by Professor Buchler during the Spring '06 term at University of Florida.

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