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anonymous

  • 5 years ago

"A football of mass 140 grams falls to the ground from a height of 1.7metres. Ignoring air resistance, calculate the peed of the ball as it hits the ground:" Took me ages to remember I can use lost in potential energy = gain in Kinetic energy. In the end, I got 5.83 m/s, just wanted to know if this is correct

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  1. anonymous
    • 5 years ago
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    Yes you are right.

  2. anonymous
    • 5 years ago
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    Yes that is correct. The quickest way to solve the problem is with the equation: velocity = root(2*height*gravity) or v=root(2gh). This is a result of the method you used - the equation comes from rearranging E(potential) = mass*gravity*height = E(kinetic) = 0.5*mass*v^2

  3. anonymous
    • 5 years ago
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    thnx

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