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anonymous

  • 4 years ago

The distance between two telephone poles is d = 49.5 m. When a 1.50-kg bird lands on the telephone wire midway between the poles, the wire sags h = 0.210 m. (a) Draw a free-body diagram of the bird. (b) How much tension does the bird produce in the wire? Ignore the weight of the wire.

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  1. TuringTest
    • 4 years ago
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    Here's the free-body:|dw:1329359401119:dw|by symmetry both tensions will have the same magnitude. The vertical components of the tensions cancel the force of gravity so the bird is at rest...

  2. TuringTest
    • 4 years ago
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    To find the tension in the wires we note that the vertical components of the tension due to each wire sum to the force of gravity.|dw:1329359587825:dw|\[\sum F_y=T_y-F_g=2T\sin\theta-mg=0\]solve for tension T.

  3. anonymous
    • 4 years ago
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    How do I find theta?

  4. TuringTest
    • 4 years ago
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    We have a right triangle:|dw:1329363602444:dw|since you know two sides of the triangle you can use an inverse trig function to find theta

  5. anonymous
    • 4 years ago
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    Thanks. Can you help me with another problem?

  6. TuringTest
    • 4 years ago
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    sorry, break time I'll check back later, just post more in the physics section and I'll look for them later

  7. anonymous
    • 4 years ago
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    ok.

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