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If a ball has a mass of 5 kg and 100 J of KE, what is its velocity?
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15 votes
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If a ball has a mass of 5 kg and 100 J of KE, what is its velocity?

User Eduardo Reveles
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2 Answers

14 votes
14 votes

Answer:

6.2m/s

Step-by-step explanation:

User Todd Berman
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16 votes


{\fcolorbox{white}{lightgreen}{\bf{\textcircled{$\checkmark$}}{Verified\:answer}}}

  • Mass of ball=m=5kg
  • Kinetic energy=KE=100J
  • Velocity=v=?

We know


\boxed{\sf K.E=(1)/(2)mv^2}


\\ \sf\longmapsto 100J=(1)/(2)5* v^2


\\ \sf\longmapsto v^2=100* (2)/(5)


\\ \sf\longmapsto v^2=20(2)


\\ \sf\longmapsto v^2=40


\\ \sf\longmapsto v=√(40)


\\ \sf\longmapsto v=6.2m/s

User Adam Bard
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