A ping-pong ball covered with a conducting graphite coating has a mass of 2.5 * 10 ^- ³ kg and a charge of 4.0 µC. What electric field directed upward will exactly balance the weight of the ball? (g = 9.8 m/s²)

Question

Quizplus · Accepted Answer

The electric field E required to balance the weight of the ball is given by E = mg/q, where m is the mass, g is the acceleration due to gravity, and q is the charge. Substituting the given values, E = (2.5 x 10^-3 kg * 9.8 m/s^2) / (4.0 x 10^-6 C) = 6.1 x 10^3 N/C.

A Ping-Pong Ball Covered with a Conducting Graphite Coating Has