Stage: 5 Challenge Level: 
The strength of gravity on the Moon is about 1/6th that on the Earth. A pole-vaulter around 2 metres tall can clear a pole about 5 metres from the ground on the Earth.
Roughly how high a pole could the pole-vaulter clear on the Moon?
Rigid Bodies. physics. Sine. Summation of series. Inequality/inequalities. Short problems. Forces. Energy. Resultants and components of forces. Creating expressions/formulae.
Published October 1999.
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