1. Consider everyone in the world walking in single-file around the equator of the Earth.
a. How many times around the Earth would that wrap (if it were possible)?
b. Is it reasonable to think that everyone walking (or running) at once could change the Earth's rotation? Discuss.
2. If you had a sailboat and the air was still that day, could you make the sailboat move by aiming an electric fan at the sail? Discuss.
3. Consider the demonstration from class - the 2 carts separated by a spring/plunger. One car has 3 times the mass of the other. What can you infer about their accelerations after the cars separate?
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