You are watching: What force keeps a satellite in orbit
So...is a satellite revolving about the planet kept ~ above its orbit by both centripetal and centrifugal force? Or only centripetal force
As i was taught earlier in college that a satellite needs both centrifugal and also centripetal force, but personally, ns think it need to only it is in centripetal force, since the satellite quiet revolves around the earth, so whereby does centrifugal force come in?. Since the only reason a satellite can be pulled from its axis the rotation is if maybe an asteroid to be to hit it or some other reasons.
newtonian-mechanics forces reference-frames centripetal-force centrifugal-force
enhance this question
edited Nov 24 "16 in ~ 13:49
157k3030 gold badges381381 silver- badges18611861 bronze badges
inquiry Nov 24 "16 at 13:27
10911 silver badge44 bronze title
add a comment |
4 answers 4
active oldest Votes
Which force is compelled by a satellite revolving about the earth?
In the paper definition of the at this time accepted concept of gravity, basic (theory of) Relativity, the price is no pressure is required.
Consider the case of a ball forced into uniform one motion because of a string. According to an accelerometer attached to the ball, over there is a continuous magnitude acceleration directed towards the center of the one path; this is the centripetal acceleration required for uniform one motion. The centripetal force responsible for the acceleration is from the tension in the string.
See more: Why Did Jesus Take Peter James And John To Be His Inner Circle?
Now, think about an accelerometer attached come a sphere in a one orbit around the Earth. We might expect that the accelerometer top top the round reads the centripetal acceleration but, in fact, the accelerometer (ideally) reads zero! Evidently, there is no net force acting top top the orbiting ball. Why then does the sphere follow a one path?
On the GR view, the sphere is adhering to an unaccelerated path (geodesic) in spacetime that is curved by the mass of the earth (Spacetime tells matter how to move; matter tells spacetime exactly how to curve).