Your spaceship lands on an unknown planet. To determine the characteristics of this planet, you drop a 1.30 kg wrench from 3.50 m above the ground and measure that it hits the ground 0.811s later. You also do enough surveying to determine that the circumference of the planet is 6.20×104 km.
Part A: What is the mass of the planet, in kilograms? M= kg
Part B: Express the planet's mass in terms of the earth's mass. M= Mearth