Physics 2008 Discuss

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

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Question 6
A
h =(u)2/g
B
h = (u)2/4g
C
h = (2u)2/g
D
h = (u)2/2g
Explanation
From V2 = U2 + 2as
O = U 2 - 2gH, since at maximum height H, the final velocity, v = O.
H = (U)2/2g
PE = KE at (1)/2 H = (U)2/2g x (1)/2 = U2 4g

Correct option: B

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1 Comment(s)

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Zora Anetor-Ebhabha said on June 17, 2021 07:42pm
I feel the explanation for this is inaccurate because, for mgh=mv2/2, it doesn't mean the object is at maximum height. I think the answer should ideally be D.
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