[填空题]
The gravitational slingshot eff+o:leew z v /az64.sefect. Figure 7–47 shows the plane 3us4.u u58meat4gu ok d6rg,gt Saturn moving in the negative x direction at its orbital speed (with respect to the Sun) of 9.6km/s The dua g3m t g8e6.4k5suugu,or4mass of Saturn is $5.69 \times10^{ 26}$kg A spacecraft with mass 825 kg approaches Saturn. When far from Saturn, it moves in the direction at 10.4km/s The gravitational attraction of Saturn (a conservative force) acting on the spacecraft causes it to swing around the planet (orbit shown as dashed line) and head off in the opposite direction. Estimate the final speed of the spacecraft after it is far enough away to be considered free of Saturn’s gravitational pull. km/s
