Recent content by Don harwood

If this is limited to a single stride of the runner what is the time per stride, then because the runner is already at spread the force is only that which maintaines that speed A weight lifter is continuously accelerating the mass against gravity Chicken or egg, who did more "what?" is silly...

If a marathon ends at the same place or elevation it began at, no work is done. A weight lifter does no work. Work = force on a body over a distance that results in an increase of potential energy of that body, no displacement no work. What you want is calories burned, one is high force very...

The larg horizontal turbines use aerodynamic lift that strongly depends on the angle of attack and the resulting vectors of motion. Any manipulation of the airstream changes this relationship, and it's alway down hill. Shrouding of any kind limits the potential energy, the bucket effect.

Study page 6 & 9 of the document momentum.pdf @ bombuli.com, it's ground breaking physics in wind power dynamics. Any structure interfacing with the wind to cause the rotational air flow will reduce the energy of the original air stream, thus less energy down stream. What you are describing is...

Betz is DOA bombuli.com 3/8 Roe Area Velocity:cubed

The true power of wind... bombuli.com ...

Go to bombuli.com for the true answer to wind power Rotation dimininishes original air flow power

Splitting hairs is not healthy. Physics is the Study of the physical universe and our place in it. Anyone who studies this with scientific rigor is a physicist. What you quibble over is competency. The comparison to other professions is lame because skill sets are not common.

The power or force is equal to the change of momentum of the air. The efficiency is how much energy is being used to change the momentum. Measure accurately velocity in and out and the energy consumption of the fan.

All energy transfer results in heat. Take the original kinetic energy equate it to heat then subtract each collision. The final result is the heat death of the universe. Entropy will not be denied.

The 8 ball hit an elastic object that absorbed the energy over a longer time then bal-ball inelastic collisions.

Look at Pitot & Bernoulli

It takes energy to creat circular motion, cut the cord and linear motion will result. How would you get the ai to spin?

Every time a baby fals down they are studying physics and Occupation does not define a scientist, It's in the heart, a desire to know I'm not a PhD but I am a physicist...