Yeah, those tricksy tricksy physics professors like to give the useless info. I ended up getting it right in the end and such (stupid lab quiz required that i use a direction, although it was implied by the positive and negative x-axis ><. Thanks for the help though. I was getting really...
I'm having a problem with one of my physics problems.
A plastic ball of radius 5 cm is hanging from a string 2m away from a charged glass rod. The ball has been charged to -5.13 microCoulombs. If the electric force on the ball is 0.6672 milliNewtons in the horizontal direction, what is the...