Using the data in Table 7.3 (see page 214), find (a) the escape speed from the surface of Mars and (b) the speed of a space vehicle when it is 1.25 X 10" m from the center of Mars if it leaves the surface at the escape speed.

Useful Planetary Data Mean Mean 72 Distance Body 10-19 Mass (kg) Radius (m) Period (s) from Sun (m) Mercury 3.18 X 1023 2.43 X 106 7.60 X 106 5.79 X 1010 2.97 Venus 4.88 X 1024 6.06 x 106 1.94 x 107 1.08 X 1011 2.99 Earth 5.98 X 1024 6.38 x 106 3.156 x 107 1.496 x 1011 2.97 Mars 6.42 X 102 3.37 x 106 5.94 X 107 2.28 x 1011 2.98 Jupiter 1.90 X 1027 6.99 X 107 3.74 X 108 7.78 x 1011 2.97 Saturn 5.68 X 1026 5.85 X 107 9.35 x 108 1.43 X 1012 2.99 Uranus 8.68 X 1025 2.33 X 107 2.64 X 109 2.87 X 1012 2.95 Neptune 1.03 X 1026 2.21 X 107 5.22 X 109 4.50 X 1012 2.99 Pluto 1.27 X 1023 1.14 X 106 7.82 X 109 5.91 X 1012 2.96 Moon 7.36 X 1022 1.74 x 106 Sun 1.991 x 1030 6.96 x 108 PhotoGrid