Question

A small drop of water is suspended motionless in air by a uniform electric field that is directed upward and has a magnitude of 8560 N/C. The mass of the water drop is 3.80 10-9 kg.
drwls
Do you realize that you have twice posted an incomplete question?

The complete question has already been posted and answered.

http://www.jiskha.com/display.cgi?id=1294529904