Answer: a. perigee speed
Explanation:
Firstly, we must define what is Perigee and Apogee:
The apogee is the point in an elliptical orbit around the Earth where a body is furthest from the center of it and according to Kepler's 2nd law the speed of a satellite at this point is the lowest.
On the other hand, the perigee is the opposite orbital point. It is where a satellite is closest to Earth and its orbital speed is maximum.
Therefore, if we want to throw an object in such a way that it is orbiting the Earth at the same distance respect to the ground, the minimum speed must be that which is in the perigee.
The altitude above Earth determines the satellite's orbital velocity. The faster the required orbital velocity becomes as one gets closer to Earth. Option b is the correct answer, that is circular satellite velocity.
The angular velocity of a satellite in a circular orbit is uniform.
A satellite in an elliptical orbit, on the other hand, cannot have uniform angular velocity according to Kepler's second rule; it must travel faster as it gets closer to the Earth.
As a result, circular satellite velocity is defined as the minimum speed required to launch an object so that it remains the same distance above the ground and just falls around the Earth.
For more information about circular satellite velocity, refer below
https://brainly.com/question/15470921
