The velocity a rocket must reach to establish an orbit around earth is called
a. thrust velocity.
c. artificial velocity.
b. orbital velocity.
d. escape velocity.

The correct answer is "orbital velocity".

Explanation:

The expression for the orbital velocity is as follows;

Here, v is the orbital velocity, G is universal gravitational constant, M is the mass of the object and r is the distance.

The velocity which is required by the rocket to establish in an orbit around Earth is called  orbital velocity.

It is the velocity which is needed to keep the satellite in the orbit of the planet. This velocity is sufficient to keep the artificial satellite in an orbit of the earth.

Therefore, the correct option is (b).

unbalanced force

explanation: