anonymous
  • anonymous
A sailor pulls a boat horizontally alongside a dock for 10.0 m with a rope angled at 40.0°. He uses a force of 100.0 N. How much work did he do on the boat? A. 766 J B. 643 J C. 1.00 * 10^3 J D. 4.00 * 10^4 J
Physics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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Michele_Laino
  • Michele_Laino
here is the situation described in your problem: |dw:1433096507947:dw|
anonymous
  • anonymous
yes:)
Michele_Laino
  • Michele_Laino
now, we have to apply this formula:

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anonymous
  • anonymous
which formula?
Michele_Laino
  • Michele_Laino
\[W = Fd\cos \left( {40} \right) = 100 \times 10 \times \cos 40\]
anonymous
  • anonymous
766.0444 so about 766 J is our answer?
Michele_Laino
  • Michele_Laino
yes! That's right!
anonymous
  • anonymous
yay!! :D
Michele_Laino
  • Michele_Laino
:D

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