Question

Your starship, the Aimless Wanderer, lands on the mysterious planet Mongo. As chief scientist-engineer, you make the following measurements: A 2.50 kg stone thrown upward from the ground at 11.0 m/s returns to the ground in 4.80 s; the circumference of Mongo at the equator is 2.00×105km; and there is no appreciable atmosphere on Mongo.

Part A

The starship commander, Captain Confusion, asks for the following information: What is the mass of Mongo?

Express your answer with the appropriate units.

Part B

If the Aimless Wanderer goes into a circular orbit 30,000 km above the surface of Mongo, how many hours will it take the ship to complete one orbit?

Express your answer in hours to three significant figures.

Answer 1