The tine sphere at the end of the weightless thread has a mass of .60g. It is immersed in air and exposed to a horizontal electric field of strength 700 N/C. The ball is in equlibrium in the position shown. What are the magnitude adn sign of the charge on the ball?
Gravitationa Force= mg
The Attempt at a Solution
So, since the ball in the equlibrium the forces are balanced.
force downwords due to gravity
Since the ball moves towords the E field, it should have a negative charge.
Fx: F(electrical field)- mgsin =0
q= mgsinθ / E
I dont get the right answer,
the answer should be -3.1qC