How do tall ships stay upright?

James from Cammell Laird explains what stops tall ships falling over with a simple experiment using a butter tub and a clothes peg!

Whilst small speed boats can get up to 80 knots, large cruise ships – even those built for speed – can only get to speeds of about 30 knots. One knot is one nautical mile per hour, and nautical miles are a little bit longer than miles on land, so 21 knots is about 24 miles an hour – and 30 knots is about 34 miles per hour.

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This video is part of Sean’s Science Around Ships – a Fun Kids series about ships and how they work. Filmed with support from Cammell Laird.

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