Your spaceship lands on an unknown planet. To determine the characteristics of this planet, you drop a 1.10 wrench from 4.00 above the ground and measure that it hits the ground 0.811 later. You also do enough surveying to determine that the circumference of the planet is 6.24×104.
A) What is the mass of the planet, in kilograms?
B) Express the planet's mass in terms of the earth's mass.