Frogs don't know physics, do they?

A frog sits on the end of a long board of length L=5L=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=9.8 m/s2g=\SI[per-mode=symbol]{9.8}{\meter\per\second\squared}.
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