the electric field is produced by two parallel plates
Code
given:
mass of the end charges is 18g, length of the thin light non conducting bar is 5cm, each charge has a magnitude of 39.5 and the potential across the plates is 9V
Questions:
a. show simple harmonic motion ensues when the bar makes small departures from equilibrium
b. if I want the period of oscillations to be 2 seconds how far apart should parallel plates be?
for a I have
F(restoring)= -2qEsin(theta) = -2qE(s/d)
-2qE(s/d)=2ma
w=omega
w=((qEs)/(md))^(1/2)
Does that prove it has shm?
and not sure where to start with question b