Two 11.5-mg balls are connected by a 28.9-cm-long insulating rod of negligible mass. one ball has a charge of +q and the other has a charge of −q. the system is placed in a 592 n/c uniform electric field. initially the system is at rest and makes an angle α= 58.9° with respect to the field. it is then released, and when it is momentarily aligned with the electric field, its kinetic energy is 4.86 mj. what is the magnitude of q?

Abasketball star covers 2.65 m horizontally in a jump to dunk the ball. his motion through space can be modeled precisely as that of a particle at his center of mass. his center of mass is at elevation 1.02 m when he leaves the floor. it reaches a maximum height of 1.90 m above the floor and is at elevation 0.910 m when he touches down again. (a) determine his time of flight (his "hang time"). (b) determine his horizontal velocity at the instant of takeoff. (c) determine his vertical velocity at the instant of takeoff. (d) determine his takeoff angle. (e) for comparison, determine the hang time of a whitetail deer making a jump with center-of-mass elevations yi = 1.20 m, ymax = 2.45 m, and yf = 0.750 m.