George stands at the top of a 100 m tall cliff and tosses a ball straight up at 15.0 m/s. He planned to catch it, but missed and the ball fell to the ground below. If George tried to catch the ball at the same height he released it, how many seconds did he have to catch it

Athin nonconducting rod with a uniform distribution of positive charge q is bent into a circle of radius r. the central perpendicular axis through the ring is a z-axis, with the origin at the center of the ring. a) what is the magnitude of the electric field due to the rod at z = 0? n/c (b) what is the magnitude of the electric field due to the rod at z = infinity? n/c (c) in terms of r, at what positive value of z is that magnitude maximum? r (d) if r = 4.00 cm and q = 9.00 µc, what is the maximum magnitude? n/c