A small object with a mass of 370 mg carries a charge of 40.0 nC and is suspended...?

Question

Physics homework, I don't know how to do it. Could you show me the steps, too?.... Thanks!: A small object with a mass of 370 mg carries a charge of 40.0 nC and is suspended by a thread between the vertical plates of a parallel-plate capacitor. The plates are separated by 5.00 cm. If the thread makes an angle of 14.0° with the vertical, what is the potential difference between the plates?

(in V)

Answer 1

Solve for the horizontal electrostatic force F, using theta, m and g:

F = mgsin(theta)

Solve for the e-field E using F = EQ:

E = F/Q

Solve for voltage using V = Ed

I get 1096.51 V.