Question on: WAEC Physics - 2008
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
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Correct Option: C
h = \(\frac{PE}{mg} - \frac{12}{0.25 \times 10} = 4.8m\)
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