When the Boat Comes In

The Problem :

 We all know thereís something unexpected about what happens when you pull something towards you that you canít quite see ... well, this is especially true for boats :

 Imagine you are on a jetty, and you are pulling in a boat that is floating on the water some way away. The rope comes up over the edge of the jetty, and lies along the jetty as you pull it in.


As you pull in 10 metres of rope, the boat clearly moves in too, but does it move exactly 10 metres, more than 10 metres or less than 10 metres ?

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Last modified: June 18, 2007