An astronaut, whose mission is to go where no one has gone before, lands on a spherical planet in a distant galaxy. As she stands on the surface of the planet, she releases a small rock from rest and Part A finds that it takes the rock 0.600 s to fall 1.90 m. If the radius of the planet is 8.60 × 10´ m, what is the mass of the planet? Express your answer with the appropriate units.

An astronaut, whose mission is to go where no one has gone before, lands on a spherical planet in a distant galaxy. As she stands on the surface of the planet, she releases a small rock from rest and Part A finds that it takes the rock 0.600 s to fall 1.90 m. If the radius of the planet is 8.60 × 10´ m, what is the mass of the planet? Express your answer with the appropriate units.