anonymous
  • anonymous
Four weightlifters (A-D) enter a competition. The mass and distance that each lifts are shown in the table drawn inside. Which weightlifter does the least work? weighlifter A, weightlifter B, weightlifter C, or Weightlifter D?
Physics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
|dw:1433095867077:dw|
anonymous
  • anonymous
W = weightlifter D =distance :)
Michele_Laino
  • Michele_Laino
the work W done, is given by the subsequent formula: \[W = mgd\]

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anonymous
  • anonymous
yes:) so the one with the least work is the smallest value of that? how can we find that?
Michele_Laino
  • Michele_Laino
it is simple we have to compute the work W for all of your four cases
anonymous
  • anonymous
ok! how do we plug in? :/
Michele_Laino
  • Michele_Laino
since the gravity g=9.81, is equal for all the weightlifter, it is suffice to compare the four products mass*distance each other
anonymous
  • anonymous
ok! so weightlifter A = 225 B=264 C=300 D=312.5 so A is our solutoin? he does the least work?
Michele_Laino
  • Michele_Laino
so: case A--->M*D=225 case B--->M*D=264 case C---> M*D=300 case D--->M*D=312.5
Michele_Laino
  • Michele_Laino
that's right!
anonymous
  • anonymous
yay!! thank you!! onto the next! :P

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