Question

A small metal sphere, carrying a net charge of 21 = -2.40 C, is held in a stationary position by insulating supports. A second small metal sphere, with a net charge of q2 = -7.20 uC 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 (Figure 1). Assume that the two spheres can be treated as point charges. You can ignore the force of gravity. 1 Figure < 1 of 1 > 92 v = 22.0 m/s 91 0.800 m

Answer 1

solutions using energy conseruation loss Yu KE = Gain in electric potential energy kq 92 > Ime ? - 12 me? moj X(22-0ry)}- £x1.5xio = 9x109x 214 x7,2x10°C 1640 kq, 92 r - f -3 -3 kq xe 2 f 1 x 115 x 10 kg -122 0.8 70.363 – 0.75X10 Xv 0.75X10**0,2 = 0.1944 19? 224,8 12 =15.0 mys (B) kq, 92 when of zo, &f=? R 9,92 rf 0.363 X 2.4% 7,2X10 so , mw? ri pol- 2.334 018 3.584 If on of = 0.28m