?  → 147N + 0-1e a) it is n (mass # : 1; charge:0) b) no right answer c) it is Br (mass # : 76; protons: 35) d) it is C (mass #: 14; protons 6) e) it is e ( mass #: 0  ; charge +1)

10. Use Coulomb's Law to solve the following problems www ww ww a) Four charges are placed in the plane as indicated q1 92 = -5 nC in rz = j, 10 nC in r, = i + 2j, 94 = 20 nC in ra = -i – 2j 93 = -2 nC in r3 = -2i + 2j force and Calculate the total acting on in direction and 92 magnitude, also draw the free body diagram.

3

2) The charge, and mass, of the proton are which of the following values? a) +1.6 x 1019 C, m = 1.67 x 10-27 kg; b) -1.6 x 1019C, 9.11 x 10³' kg; c) 0, 1.67 x 1027 kg; and d) 3.2 x 1019 C, m = 1.8 x 1030 kg. 3) A proton is placed in a uniform electric field of 2.75 x 103 N/C. Calculate the following: i) magnitude of the electric force exerted on the proton; i) the proton's resultant acceleration; and ii) the speed of the proton, 1 usec after being released in the field, assuming it starts from rest. Show all work for credit. a) F(p) = 4.4 x 10:16 N, a(p) = 2.75 x 10" m/s², v(p) = 2.75 x 10' m/s; b) F(p) = 20 x 1018 N, a(p) = 1.2 x 101º m/s², v(p) = 1.4 x 10ʻ m/s; c) F(p) = 8 x 1016 N, a(p) = 4.8 x 10" m/s², v(p) = 2.63 x 105 m/s; or d) F(p) = 120 x 1019 N, a(p) = 63 x 10° m/s², v(p) = 8 x 10³ m/s. %3D %3D %3D %3D