Question

what conditions must be met if a man made satellite is to attain a circular orbit around the earth ? (choose as many as apply) (A) it must be launched with with a tangential speed of 0 (B) it must be launched with a tangential speed of 8 km/s (C) it must be launched with a tangential speed greater than 8 km/s (D) it must be launched horizontally at a distance over 150 kilometers above the earth (E) it must be launched vertically with a speed of 8 km/s
i said d and a

Answer 1

Do you know what is tangential speed?

Answer 2

tangential speed is tangent to the way the object is moving

Answer 3

circular orbit:
gravitational force = centripetal force to keep it in the circular orbit

Answer 4

minimum speed = \[\sqrt{gr}\] where r is the radius of the orbit. if its less, the object falls on the surface

Answer 5

im really confused :/

Answer 6

For Solving this Question, I would like to ask you that, do you have the detailed conception of : Satellite