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The spring of a dart gun exerts a force on a 0.02 kg dart as it is launched from the gun with 4.00 J of KE. At what velocity does the dart come out of the gun?
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The spring of a dart gun exerts a force on a 0.02 kg dart as it is launched from the gun with 4.00 J of KE. At what velocity does the dart come out of the gun?

User Dan Smart
by
8.7k points

1 Answer

5 votes

Let's see

  • KE=1/2mv²

m is mass and v is velocity

  • 2KE=mv²
  • 4(2)=0.02v²
  • 8=2v²/100
  • 2v²=800
  • v²=400
  • v=20m/s
User Xzhsh
by
8.2k points
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