Ok. I first write the equation of forces
mv^2/r = GmM/r^2
then multiplying both sides by r and dividing by 2
1/2 mv^2 = GmM/2r (The equation which you told)
V = \sqrt{GM/r}
this v is true when the objects are balanced. However to find the escape velocity I will have to balance...
Thanks rcgldr and Janus for correcting me.
Velocity and force sometimes confuse me. I approached the concept of escape velocity as if the escape force. I guess the only way to determine the velocity is using the kinetic and the potential energies. So thanks again.
I think when we increase the velocity of the object, centrifugal force becomes greater then attractive force so it escapes. However my equation is still false, why?
Hi guys!
I want to ask something about escape velocity.
I know the definition of EV "escape velocity is the speed at which the kinetic energy plus the gravitational potential energy of an object is zero"(wikipedia).
Can we approach the problem by equalling the attractive force to the...