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If a body mass 5kg is thrown vertically upwards with velocity u,at what height will...

Physics
JAMB 2008

If a body mass 5kg is thrown vertically upwards with velocity u,at what height will the potential energy equal to the kinetic energy?

  • A. h =(u)2/g
  • B. h = (u)2/4g
  • C. h = (2u)2/g
  • D. h = (u)2/2g
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Correct Answer: Option B
Explanation

From V\(^2\) = U\(^2\) + 2as
O = U\(^2\) - 2gH, since at maximum height H, the final velocity, v = O.

when K.E = P.E
∴ H = \(\frac{(U)^2}{2g}\)
Halfway is the  \(\frac{\text{height}}{2}\)

PE = KE at \(\frac{(1)}{2}\) H = \(\frac{(U)^2}{2g}\) x (\(\frac{1}{2}\)) = \(\frac{U^2}{4g}\)

There is an explanation video available below.


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Explanation Video

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