Recent content by procon4

Hi everyone. I am investigating the best online/free university physics resources that could be incorporated into a university physics curriculum. I am looking specifically for resources recommended by students. In addition to actual materials, I am also compiling teaching strategies that...

So just to clarify the situation here, the star at the center of the planet's orbit is not the sun. But another problem was that I needed to find the mass of the star, not the planet. To do that, I just used the F=ma equation, with F being the force of gravity, m being the mass of the planet...

That's a really good suggestion--I'm surprised that equation isn't in our textbook. The problem is that the mass of the star around which the planet orbits is not given. So I guess there must be some relationship between period, orbital radius, and mass, but I'm not sure what it is. I would...

Homework Statement What is the mass of a planet (in kg and in percent of the mass of the sun), if: its period is 3.09 days, the radius of the circular orbit is 6.43E9 m, and the orbital velocity is 151 km/s.Homework Equations I'm unsure what formulas to use, though these seem relevant. F=...