1. The problem statement, all variables and given/known data A satellite S is moving in an elliptical orbit around the earth. The mass of the satellite is very small compared to the mass of the earth. Choose the correct statement. Ans: (A) the acceleration of S is always directed towards the centre of the earth 2. Relevant equations F= GMm/R2 3. The attempt at a solution In an elliptical orbit, since the velocity changes at different points, shouldn't there be a tangential acceleration as well, which would alter the direction of the net acceleration (tangential + radial)? I know however, that there isn't a tangential acceleration, because till date, I have never considered it in any problem. I just can't justify why it wouldn't exist. Please help?