An object of mass 0.25kg moves at a height h above the ground with a...
PHYSICSWAEC 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
Correct Answer: C. 4.8m
Explanation
h = \(\frac{PE}{mg} - \frac{12}{0.25 \times 10} = 4.8m\)
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