# orbitting around the earth

Does a space station need an initial velocity (tangentially) to be able to orbit around the earth or just the gravitational force acting downward on the station at certain height from the ground is enough?

• what-if.xkcd.com/58 – John Dvorak Aug 24 '13 at 19:17
• By definition of "orbit" (go look this up!), yes it needs velocity. Otherwise, by applying Newton's Law (apply it!), it will fall and hit earth. – Chris Gerig Aug 24 '13 at 19:44