Two identical planets, each with a mass of 1024 kg, orbit around the midpoint between the two planets. If the distance between the two planets is 2 x 108 m (as measured from their centers), how fast is each of the planets moving in their orbit?

An electron is ejected into a horizontal uniform e⃗ field at a parallel horizontal velocity of v0. assume the electron's initial position x0, initial velocity v0, time t, magnitude of electric field e, electron's mass m, and the magnitude of the electron's charge |e|. ignore the force that earth exerts on the electron. assume the e⃗ field is in the same direction as the initial velocity. part a define the equation for the electron's velocity. express your answer in terms of the variables v0, |e|, t, e, and m.