What condtions u need for zero gravity state?

AI Thread Summary
A zero-gravity state occurs in a spacecraft in circular orbit around Earth due to the balance of gravitational force and centripetal force. The equation mMG/R^2 - N = mV^2/R illustrates this balance, where N is the normal force. For a zero-gravity experience, the normal force (N) must equal zero, which happens when gravitational force (MG/R^2) equals the centripetal force (V^2/R). This condition is met when the spacecraft's velocity is precisely aligned with the gravitational pull at that orbital radius. Understanding these forces clarifies why astronauts experience weightlessness in orbit.
nadavg54
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i read that if u r in "spaceship" that's for example has circular orbit around Earth - than u r in a zero gravity state.
but from Newton law u get this equations :
mMG/R^2-N=mV^2/R

so from this i get that N equal MG/R^2-V^2/R
and why would MG/R^2-V^2/R be zero ? no metter what?
 
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