Metabolic Power Formula Physics

Power is the rate of doing work. For example if the runner in the picture commits 5 joules of total mechanical work per kilogram every second power 5 watts kg 1 w 1 joule second.

Power Boundless Physics

Ibw kgs 22 x height in meters 2.

Metabolic power formula physics. Also available is ms word format. So on my estimate. Indeed whereas for any given incline the energy cost of running is independent of the speed the energy cost of walking reaches a minimum at an optimal speed above and below which it increases.

If q 0 is the animal s metabolic rate and m the animal s mass then kleiber s law states that q 0 m thus over the same timespan a cat having a mass 100 times that. Abw ibw 0 4 actual weight ibw in obese patients where actual body weight is 30 over calculated ibw an adjusted body weight abw is often recommended for drug dosing. And the extra power needed is energy time mgh t 65 9 8 1100 37 5 60 311 w.

Furthermore the metabolic power approach will be updated to make it possible to estimate energy cost and metabolic power also during walking episodes. Energetics of walking and running. The same amount of work is done when carrying a load up a flight of stairs whether the person carrying it walks or runs but more power is expended during the running because the.

A brief overview of power in an algebra based physics course. The extra energy needed is mgh 65 9 8 1100 j. Metabolic energy metabolic power input x time 18 333x10 3 x 60 s 11x10 5j s.

Kleiber s law named after max kleiber for his biology work in the early 1930s is the observation that for the vast majority of animals an animal s metabolic rate scales to the power of the animal s mass. Energy transfer can be used to do work so power is also the rate at which this work is performed. The yellow dot represents the center of mass and the vertical amplitude of it s movement represents vertical oscillation.

To be added to the level ground value. What follows is an estimate of the power consumed in walking and in running as a function of a person s mass m leg length l and running speed v. Metabolic power p met of two starlings during wind tunnel flight carrying a respirometry mask measured from the rates of oxygen consumption and carbon dioxide production bird 15 solid line p met 2 03 12 6 v 1 0 0013 0 0005 v 3 10 10 1 87.

Bird 19 broken line p met 59 0 27 7 v 1 0 0020 0 0006 v 3 4 07 3 42 means s e m n 24 for bird 15 and 21 for bird 19 where v is flight speed. Substituting the expression for w into the definition of power given in the previous equation mathrm p frac w t yields mathrm p dfrac w t dfrac frac 1 2 mv 2 f mgh t entering known values yields. For c then time metabolic energy metabolic power input 5 6x10 6 js 18x10 3 js 311s 310s for correct.

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