A neutron star has a mass five times that of Earth and a 10 KM radius. Find the distance from this star's surface a satellite must be at to stay in a circular orbit if the satellite is moving at 50000 km/min.(adsbygoogle = window.adsbygoogle || []).push({});

First, I changed the 10 KM to meters and found the mass of this neutron star. Then, I changed the 50000 km/min to 833,333 m/s (tell me if this is incorrect). Next, I used the equation v = squareroot GM/R and plugged in (6.67 x 10 to the negative eleventh power) for G and (10 to the 31st power) for M and the radius is unknown. I came up with -10,000 m, which is obviously incorrect. Am i doing something wrong?

**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!

# Homework Help: Surface Gravity of a Neutron Star

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