Once a satellite achieves orbit, why does it stay there without any additional energy being used?
A - due to centripetal force
B - due to it's inertia
C - because of the reactive force
D- because of gravity
Is it A?
agree
https://www.google.com/search?client=safari&rls=en&q=centripetal+force&ie=UTF-8&oe=UTF-8
Yes, you are correct. The satellite stays in orbit due to the centripetal force, which is option A.
To explain further, when a satellite is launched into space, it is given an initial velocity called the orbital velocity. This velocity is carefully calculated by taking into account the gravitational force of the planet or celestial body around which the satellite orbits.
Once in orbit, the gravitational force of the planet acts as the centripetal force, continuously pulling the satellite towards the center of the planet. This force constantly changes the direction of the satellite's motion, causing it to move in a circular or elliptical path.
Inertia, mentioned in option B, is the tendency of an object to resist changes in its motion. While inertia plays a role in keeping the satellite moving in a straight line, it is the centripetal force provided by gravity (option A) that keeps the satellite in a curved path, resulting in a stable orbit.
The reactive force mentioned in option C is not applicable in this context. Reactive forces occur as a reaction to an action, like Newton's third law of motion. In the case of satellites in orbit, there is no significant reactive force directly involved in keeping the satellite in orbit.
Lastly, gravity, mentioned in option D, is indeed one of the key factors in maintaining the satellite's orbit. However, specifically, it is the centripetal force provided by the gravitational pull that keeps the satellite in orbit, rather than just gravity alone.