A Small Styrofoam Ball of Mass 0 $\vec { E }$

question 100

Multiple Choice

A small styrofoam ball of mass 0.120 g is placed at rest in an $\vec { E }$ field of 6000 N/C pointing downward.What excess charge must be placed on the ball for it to remain suspended in the field?

• A)-16.0 nC
• B)-18.0 nC
• C)-57.2 nC
• D)-125 nC
• E)-196 nC