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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
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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anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Yes 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
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