The record for a standing high jump (jumping from the ground to a platform of height h) is 67 in. How much force did the athlete exert during his jump?

(Thanks to Rocco Lapenta for inspiring this question.)

How many dogs jumped to catch a frisbee yesterday? (Thanks to Radiolab for suggesting the question.)

Look for the answers online at under “Browse,” at the very end of the current issue.

Question suggestions are always welcome!

For more Fermi questions and answers, see Guesstimation 2.0: Solving Today’s Problems on the Back of a Napkin, by Lawrence Weinstein (Princeton University Press, 2012).

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