a flat-screen tv weighs 147 newton's. the mad of the tv is blank kilograms use g=9.8 N/kg for gravity

Answer form flower;

Ithink the answer would be a 

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.