Jupiter has a mass of 1.9 x 10 / kg. and its moon lo has a mass of 8.9 x 10 j kg. Their centers are separated by a distance of 421,700 km. a. What is the force of gravity acting on lo? b. What is the acceleration of Jupiter due to the force of gravity between it and lo? c. lo has a radius of 1821 km. What is the acceleration of gravity on the surface of lo? d. You drop a rock from a height of 3 m on lo. How long does it take the rock to reach the surface