here's some beginners physics to explain
F = force due to gravity in this case (Newtons)
G = gravitational constant 6.674×10^-11 m^3⋅kg^-1⋅s^-2.
m1 = Mass of an object, in our case earth (Kg)
m2 = Mass of another object, in our case a person weighing 80kg
d = distance from the center of mass of m1 and m2 (6.3781×10^6 m in our case, radius of the earth)
now since F = ma
a = acceleration (m/s^2)
we can substitute
m2a= (G m1*m2)/d^2
to
a = (Gm1)/d^2
a ≈ 9.79 m/s^2
we call a in this case g, NOT G.
just to clarify some things. G isn't the acceleration due to gravity we feel on earth but instead the gravitational constant.
(gravity doesn't cause all things to accelerate at the same rate in all conditions if the math didn't make this clear, under different conditions objects will accelerate at different rates due to gravity)
Quote (card_sultan @ May 8 2018 12:29pm)
Theorietical Astro science or Scientism calls Big G a constant (only slowed by drag) and it was theorized that an object in a perfect vacuum would be constantly accelerating but that is not the case because orbits are claimed to be a constant speed (probably from the mass of an object - but we are told mass does not affect speed (drop a bowling ball and a marble and they fall at the same speed), yeah there tons of hypocrisies going on there. Ya but its your relegion, you can deal with it.
an object in orbit is always accelerating, acceleration is a vector. Everything in the observable universe is technically accelerating.
This post was edited by majorblood on May 8 2018 06:01pm