Un satellite m=1800kg se se deplace vers la ligne selon la ligne qui passe par leurs centres de gravite. On appelle a la distance entre le Centre de gravite de la Terre et celui du satellite et D la distance entre la Terre et la lune on Donne D=3,84*10^{5} 1) Donner l'expression de l'intensite commune de l'attraction universselle exerce entre le Terre et le satellite puis celle exerce entre la lune et le satellite

An electron and a proton are held on an x axis, with the electron at x = + 1.000 m and the proton at x = - 1.000 m. part a how much work is required to bring an additional electron from infinity to the origin? express your answer with the appropriate units. part b if, instead of the second electron coming in from infinity, it is initially at x = + 20.00 m on the axis and is given an initial velocity of 100.0 m/s toward the origin, does it reach the origin? part c how close to the origin does it come?