Chapter 4: Q5E (page 777)
A small metal sphere, carrying a net charge of q1 = -2.80 µC, is held in a stationary position by insulating supports. A second small metal sphere, with a net charge of q2 = -7.80 µC and mass 1.50 g, is projected toward q1. When the two spheres are 0.800 m apart, q2, is moving toward q1 with speed 22.0 m/s (Fig. E23.5). Assume that the two spheres can be treated as point charges. You can ignore the force of gravity.
(a) What is the speed of q2 when the spheres are 0.400 m apart?
(b) How close does q2 get to q1?
Short Answer
- The speed of charge q2 when the spheres are 4.00 m apart is .
- The distance between the charges is 0.323 m.