Frogs don't know physics, do they?

Classical Mechanics Level 1

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 \(g=\si{9.8\ \meter\per\second^2}\).

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