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23 May 2015, 7:53 am
23 May 2015, 10:01 am
23 May 2015, 11:22 am
michael517 wrote:
Keeping in mind that velocity is relative to viewing point, but if I am standing next to another human on a flat surface, his/her velocity is zero, so the KE would be zero. (Actually it isn't since both are on the Earth which is turning).
The potential energy I would assume would be compared to falling down and laying on the floor.
To compute the change in potential energy, you would have to integrate mass * height, then multiply by g, for the two states. Good luck with that, you would need a model of a human with densities.
Best bet would be to assume the mean height is about half, multiply by the weight. If the weight is in kilo's, multiply by g. Then you would have to make a guesstimate on the average height of the human when laying on the floor, maybe 6 inches, calculate, then subtract the two energy states.
Watch out with units when using "English" or "SAE" or whatever the USA uses.
So wild guessing, I would say about 2.5 feet * weight * scale factor I would have to crack open the physics book or google.
Kinetic energy = ½ * mass * (velocity)²
Potential energy ~= mass * g * height
but to do it right you have to integrate over the volume.
The potential energy I would assume would be compared to falling down and laying on the floor.
To compute the change in potential energy, you would have to integrate mass * height, then multiply by g, for the two states. Good luck with that, you would need a model of a human with densities.
Best bet would be to assume the mean height is about half, multiply by the weight. If the weight is in kilo's, multiply by g. Then you would have to make a guesstimate on the average height of the human when laying on the floor, maybe 6 inches, calculate, then subtract the two energy states.
Watch out with units when using "English" or "SAE" or whatever the USA uses.
So wild guessing, I would say about 2.5 feet * weight * scale factor I would have to crack open the physics book or google.
Kinetic energy = ½ * mass * (velocity)²
Potential energy ~= mass * g * height
but to do it right you have to integrate over the volume.
Thank you so much for this, I really appreciate it
