Finding velocity from radians
Compute the speed of a point on the surface of the Earth at equator due to the rotation of the Earth around its axis. The radius of the Earth is approx. 6400km.
My problem here is that I don't understand where to start. I have the equation to find speed, which I can plug into another equation for velocity, but the problem is that I need the angle to find speed. How would I find the angle?