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Learning Resources

Solution to Fun with Fundamentals Puzzler: A Stupid Dream

May 5, 2013

How high must Thrasher start from to be able to make it safely around the loop without falling off due to gravity? Let's find out.

Elisabeth Eitel

Review the problem: A Stupid Dream.

How high must Thrasher start from to be able to make it safely around the loop without falling off due to gravity?

Well, it 's a matter of gravitational potential energy and kinetic energy. Thrasher must start on his skateboard at least 12.5 ft. above the ground in order to complete the loop without falling off due to gravity.

Give me the next puzzle —
Gone to the dogs.

Machinedesign Com Sites Machinedesign com Files Uploads 2013 05 296 Fundy Puzzle

About the Author

Elisabeth Eitel

Elisabeth Eitel was a Senior Editor at Machine Design magazine until 2014. She has a B.S. in Mechanical Engineering from Fenn College at Cleveland State University.