A small rock passes a massive star, following the path shown in red on the diagram. When the rock is a distance 4.5 × 1013 m (indicated as d1 in Figure XXXXXXXXXXfrom the center of the star, the...

A small rock passes a massive star, following the path shown in red on the diagram. When the rock is a distance 4.5 × 1013 m (indicated as d1 in Figure 11.84) from the center of the star, the magnitude p1 of its momentum is 1.35 × 1017 kg · m/s, and the angle is 126°. At a later time, when the rock is a distance d2 = 1.3 × 1013 m from the center of the star, it is heading in the −y direction. There are no other massive objects nearby. What is the magnitude p2 of the final momentum?