anonymous
  • anonymous
A sailboat moves north for a distance of 10.00 km when blown by a wind from the southeast with a force of 5.00 × 10^4 N. How much work was done by the wind? A. 0.00 J B. 3.54 * 10^5 J C. 3.54 * 10^8 J D. 5.00 * 10^8 J
Physics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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Michele_Laino
  • Michele_Laino
here is the situation described by your exercise: |dw:1433093509593:dw|
anonymous
  • anonymous
yes:)
Michele_Laino
  • Michele_Laino
so the requested work is given by the subsequent formula: \[\begin{gathered} W = Fd\cos \l|dw:1433093749565:dw|eft( {45} \right) = 5 \times {10^4} \times {10^3} \times \cos 45 \hfill \\ \hfill \\ \end{gathered} \]

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anonymous
  • anonymous
the equation you wrote does not show on my side :(
Michele_Laino
  • Michele_Laino
oops... \[W = Fd\cos \left( {45} \right) = 5 \times {10^4} \times {10^3} \times \cos 45\]
anonymous
  • anonymous
okay! so we get 35355339.06?
anonymous
  • anonymous
so our solution is choice C?
Michele_Laino
  • Michele_Laino
yes! it is 3.54 * 10^8 joules (approximated value)
anonymous
  • anonymous
yay!! :) so onto the next one!! :P
Michele_Laino
  • Michele_Laino
ok!

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