Q. Two tiny spheres are identical and carry charges of -30 uC and +60 uC. They are separated by a distance of 14 cm. What is the magnitude and direction of the electric field at a point midway between two charges?
Q. A rock of mass 33 kg accidentally breaks loose from the edge of a cliff and falls straight down. The magnitude of the air resistance that opposes its downward motion is 242 N. What is the magnitude of the acceleration of rock?