1. Two planets of mass 7. 1 x 10 kg and 2.3 x 10" kg are respectively placed at A and B. An asteroid (of mass A 20 1. 1 x 10"kg ) is positioned at G. The scale and unit of the x- and y-axes is 10 km. Determine: G 15 a) the net force that the asteroid at G experiences b) where should the asteroid be placed so that the net 10 force on it is zero (hint: somewhere between A and B B) assuming the other two planets are fixed in their 5 respective locations at A and B. ** Note: A(0, 21), G(10, 15), B(25, 6) - 5 0 5 10 15 20 25 30 35 40 2. The charges in the diagram (identical for A, B, C, D, E) Ty C are considered at this instant in time. The scale and unit 30 of the x- and y-axes is 10 "um. Note: Take the q to be a proton (while qA = 98 = 9 = 9p = 9= = q ); 25 B D Determine the net electric field at location (3, 17) which is 20 the centre of the circle. 15 10 ** Note: A(- 9, 8), B(- 11, 22), C( 3, 32), D(17, 22), E(15, 8) A E 5 -15 -10 -5 0 5 15 20 25 30