Question 21 5 pts A small space rock of mass m is released from rest a very long distance away (“infinity from a planet of mass M and radius R. The rock falls to the planet’s surface. What is the network done on the rock by the force of gravity from the initial moment of release to just before it hits the surface of the planet? You can ignore air resistance and assume that the rock falls in along a radial direction, ie, directly towards the center of the planet. OGM OM
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