The radius of Jupiter (from the center to just above the atmosphere) is 71500 km (71500x103 m), and its mass is 1900x1024 kg. An object is launched straight up from just above the atmosphere of Jupiter. (a) What initial speed is needed so that when the object is far from Jupiter its final speed is 23500 m/s? Vinitial = 3 X m/5 (b) What initial speed is needed so that when the object is far from Jupiter its final speed is 0 m/s? (This is called the "escape speed.") Vescape = x m/S