A. 200J
B. 4000J
C. 2000J
D. 500J
Correct Answer:
Option C – 2000J
Explanation
Kinetic Energy = mgh
= 20 x 10 x 10 J
= 2000J
![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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