Physics WAEC

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]

A. 0.8m
B. 4.0m
C. 4.8m
D. 5.6m

Correct Answer: Option C

C. 4.8m

Explanation

h = PE/mg−12/(0.25×10) = 4.8m

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6 years ago

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