# Cliff diving

Cliff diving is an extreme sport. If a cliff diver dives from a platform 50 meters above the water, how long does the dive take in seconds?

Details and assumptions

• The acceleration of gravity is $$-9.8~\mbox{m/s}^2$$.
• The diver can be treated as a point mass and has no vertical velocity at the start of the dive.
• Ignore air resistance.
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