QUESTION 2 A system consists of three identical point particles arranged in a line as shown in the figure. The mass of each point particle is 3 kg and the distance d = 0.2 m. What is the magnitude of the net gravitational force (in nN) acting on point particle B? QUESTION 3 Two identical point particles, each with a mass of 4 kg, are separated by a distance of 0.2 m. What is the magnitude of the gravitational force (in nN) exerted by one point particle on the other?