In: Physics
Three point charges are placed at the corners of a right-angle triangle, as shown in the figure. The masses, charges and coordinates of the three objects are given as follows: Mass (g): Charge (μC): Coordinate (mm): ?1 = 2.30 ?1 = −1.25 ?1 = (0; 6.00) ?2 = 0.15 ?2 = +0.55 ?2 = (0; 0) ?3 = 1.50 ?3 = −2.05 ?3 = (4.00; 0) (a) Determine the coordinate of the centre of mass of the system. (b) Calculate the magnitude and direction of the electric field at point A, which is at the coordinate (0 ; 3.00) mm.