1) The problem: Mars orbits the Sun at a distance of 2.3 * 10^10 m with a speed of 24000 m/s. If it's speed were increased to 30000 m/s, at a time when no other planet was nearby, would mars leave the Solar System. 2) Fc=Fg Orbit formulas and such 3) I'm assuming you have to find the escape velocity of Mars, and use it to see if it gets out of the field. But I'm not sure, any help would be awesome :) Edit 1) Fc=Fg V^2=GM/r 30000^2=(6.67 * 10^-11)(1.98*10^30)/r R= 1.467 * 10^11 I'm not sure where the edge of the solar system is, and I doubt that's right. But worth a shot.