The Tesla Roadster is an all-electric sports car. It can accelerate from 0-60 mph in just 3.9 seconds, and has a top speed of 125 mph. The weight of the Roadster is 2700 pounds.
Joe drives his Roadster on a wide, flat pad of concrete. There is a circle of radius R = 50 m marked on the pad, and Joe tries to keep the car on the circle. He finds that he can drive at a maximum speed of v = 49 mph without skidding.
Nosy aliens see Joe driving around and around in a circle. "Wow, this is cool!" they say. "We simply must show the Hendersons back home in Copernicus crater."
The aliens transport Joe, his car, and his concrete skid pad onto the Moon, where the local acceleration due to gravity is just one-sixth that on the Earth.
Copyright © Michael Richmond. This work is licensed under a Creative Commons License.