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anonymous

  • one year ago

A man pulls a 50.0 kg box with a rope parallel to the ground. He pulls the box 10.0 m. About how much work has he done? 5 J , 0.2 J , 5000J , or 500 J ?

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  1. perl
    • one year ago
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    $$ \rm Work = F \cos \theta ~\Delta x $$ but here theta = 0 , so the equation simplifies to Work = Force * distance The force here is due to weight, weight = mass * gravity work = (50 kg * 9.8 ) * 10 meters

  2. Michele_Laino
    • one year ago
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    that's right! @perl

  3. anonymous
    • one year ago
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    so 4900? so approximately 5000 J is our solution?

  4. perl
    • one year ago
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    correct

  5. anonymous
    • one year ago
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    yay!! thanks!!

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