what is the gravitational acceleration ON the surfaceof Mars, if its mass is 6.39∙1023 kg, and the
radius is 3.39∙106 m? (b) How many times is this accelerationgreater than the gravitational
acceleration at the location OF Mars, provided by the Sun (mass ofthe Sun is 1.99∙1030 kg, and the
radius of Mars’ orbit is 2.28∙1011 m)? (c) If it takes Mars 687days to complete one revolution around
the Sun, calculate Mars’ tangential and the angular velocity
