A. 3.0J
B. 6.0J
C. 30.0j
D. 60.0J
Correct Answer: Option D
D. 60.0J
Explanation
K.E = P.E = mgh
= 0.5 x 10 x 12 = 60J
![An object of mass 0.25kg moves at a height h above the ground with a speed of 4ms-1, if its mechanical energy at this height is 12 J, determine the value of h. [g = 10ms-1]](https://erudites.ng/wp-content/plugins/contextual-related-posts/default.png "An object of mass 0.25kg moves at a height h above the ground with a speed of 4ms-1, if its mechanical energy at this height is 12 J, determine the value of h. [g = 10ms-1]")
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