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And, Cap'n, what is the energy of the car if it's on a conveyor belt which is running at 88fps and the car is faing against the direction of the belt's travel doing 60mph? <img src="/forums/images/graemlins/evil.gif" alt="" />


Zero, if that 60 MPH is relative to the conveyor, and not the Earth. <img src="/forums/images/graemlins/butwiggle.gif" alt="" />

Now instead of a car, let's substitute a Cessna 182 at half its rated load capacity. [Linked Image]

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Stay the Trail!