# Frogs don't know physics, do they?

A frog sits on the end of a long board of length $$L=5$$ m. The board rests on a frictionless horizontal table. The frog wants to jump to the opposite end of the board.

What is the minimum take-off speed (in m/s) relative to ground that allows the frog to complete the trick?

Assumptions and Details

• The board and the frog have equal masses.
• The frog's feet do not slip on the board.
• Let $$g=\SI[per-mode=symbol]{9.8}{\meter\per\second\squared}$$.
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