this is a physiology quiz. the congregation is hereby challenged to explain the proper role of gravity in running.
this is a physiology quiz. the congregation is hereby challenged to explain the proper role of gravity in running.
it keeps you from floating to mars
Traction. We can't fly.
Gravity is what causes the normal force (by Newton's Third Law), which causes friction--which, yes, gives you traction.
Alternatively, if you want the quack-science version,
gravity provides a source of potential energy which is converted by the limbs into kinetic energy for propulsion
Where the heck was this topic when I needed it!?!? This was part of my final project. took 4ever to determine some sorta formula that i forget now. lol
We'd be lamenting the lower gravity on some floating rock like Ceres. Seeing as how Ceres isn't massive enough to retain an atmosphere, it would be kind of hard to breathe there.
Then again, if we tried to get on a neutron star, we'd be torn straight apart from differential force (the star's mass would accelerate our feet faster than our head, which would be a couple of meters further away).
We're well-suited to Earth's gravity, having a favorable strength-to-size ratio for it (as well as being able to extract oxygen in the amounts Earth retains at the surface) and we easily strengthen muscles and form motor patterns while we're learning to crawl (apologies to Chrissie Hynde), walk, run and jump.
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