Question

If the electric charge on the object is tripled while its mass remains the same, find the direction and magnitude of its acceleration. direction

Answer 1

F = qE = mg

E = mg/q = 0.017*9.81('-3.1x10^-6) = 5.38x10^4 = -53,800 N/C

E' = 0.5E = -26,900N/C 

 2q -mg= ma, Answer is 9.81 m/s^2  and it's positive because the force is upward.