A landing craft with mass 1.26×104 is in a circular orbit a
distance 5.90×105 above the surface of a planet. The period of
the orbit is 5600. The astronauts in the lander measure the
diameter of the planet to be 9.80×106 . The lander sets down at
the north pole of the planet. What is the weight of an astronaut
of mass 84.9 as he steps out onto the planet's surface?