two charges create 8.00 N of electric force on each other. if you increase their distance to twice its original value, how much electric force do they exert on each other

Ineed the answers for these promblems i have

Arocket starts from rest and moves upward from the surface of the earth. for the first 10.0 s of its motion, the vertical acceleration of the rocket is given by ay = 12.80 m/s32t, where the +y-direction is upward. (a) what is the height of the rocket above the surface of the earth at t = 10.0 s? b) what is the speed of the rocket when it is 325 m above the surface of the earth?

Mechanical energy is when the amount of kinetic and potential energies added together remains the same. conserved created lost