In a tug of wars one team gives way to other. what works is being done and by whom.

Protons have a positive charge and, collectively, give an element its atomic number.

Answer mechanical energy;

The answer is 4f======since electrostatic force is given by    we let f be the electrostatic force when  r = 1 m    if we let  denote the electrostatic force when the distance is decreased so that r = 0.5m, then    we established earlier that f = kq₁q₂. therefore    the force will now be 4f.