Circular motion question. !!!

I keep getting this question wrong and I have been at it for two days :angry:

The gravitational force on a satelite of mass m at a distance r from the centre of the Earth is 4.0 x10^14 (m/r^2) . Assuming that the Earth is a sphere of radius 6.4x10^3 km, find the period of revolution ( in hours) of a satelite moving in a circular orbit at a height of 3.6x10^4 km above the Earths surface.

answer is 24.1 hours any ideas on the calculation ?? much appreciated.

Reply 1

Emissionspectra

11

Original post by coco739

I keep getting this question wrong and I have been at it for two days :angry:

The gravitational force on a satelite of mass m at a distance r from the centre of the Earth is 4.0 x10^14 (m/r^2) . Assuming that the Earth is a sphere of radius 6.4x10^3 km, find the period of revolution ( in hours) of a satelite moving in a circular orbit at a height of 3.6x10^4 km above the Earths surface.

answer is 24.1 hours any ideas on the calculation ?? much appreciated.