anonymous
  • anonymous
1. Florence Griffith-Joyner of the United States set the women’s world record for the 200 m run by running with an average speed of 9.37 m/s. Suppose Griffith-Joyner wants to jump over a river. She runs horizontally from the river’s higher bank at 9.37 m/s and lands on the edge of the opposite bank. If the difference in height between the two banks is 2.00 m, how wide is the river?
Physics
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SOLVED
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katieb
  • katieb
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shamim
  • shamim
formula is\[h=ut+\frac{ 1 }{ 2 }g t ^{2}\]
shamim
  • shamim
but initial velocity is\[u=0\]
shamim
  • shamim
so\[h=\frac{ 1 }{ 2 }g t ^{2}\]

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shamim
  • shamim
\[t=\sqrt{\frac{ 2h }{ g }}\]
shamim
  • shamim
wide of river will b\[s=9.37t\]

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