If energy E, velocity v and time T are taken as fundamental physical quantities for measurement,

then dimensional formula for mass will be...
please answer with explanation
(1) [EV²T]
(2) [E²V^–2]
(3) [EV^-2]
(4) [E^-1V²T]

Sorry i don’t know what to do

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.