Hi all,(adsbygoogle = window.adsbygoogle || []).push({});

I have a question on the movement of a point on a sphere.

Consider a point [tex]P(\theta,\phi)[/tex] ([tex]\theta[/tex] and[tex]\phi[/tex] are the latitude and the longitude, respectively)moving from a point [tex]P_1(\theta_1,\phi_1)[/tex] to a point [tex]P_2(\theta_2,\phi_2)[/tex] with a constant speed [tex]v[/tex].

How to find the latitude and the longitude of [tex]P(\theta,\phi)[/tex] (the expression of [tex]\theta[/tex] and [tex]\phi[/tex]) if we suppose that the trajectory is the shortest distance between [tex]P_1[/tex] and [tex]P_2[/tex] ?

thanks.

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Movement on a Sphere

**Physics Forums | Science Articles, Homework Help, Discussion**