Question

A +3.00); C charge with a mass of 4.00 x 10-3 kg hovers above a horizontal flat insulating surface, neither descending nor ascending, and thus in mechanical equilibrium. Taking g = 9.8 m/s2, what is the magnitude of the electric force on the charge? Hint: keep in mind that the weight force is given by F mg ? A. 0.0281 N O B. 0.0392 N C. 0.0473 N 0 D. 0.0671 N

Answer 1

option (B)

Step-by-step explanation:

q = 3 c, m = 4 x 10^-3 kg, g 9.8 m/s^2,

In the equilibrium condition, the weight of the charge particle is balanced by the electrostatic force.

q E = mg

Electrostatic force = m g = 4 x 10^-3 x 9.8 = 0.0392 N