Of Whips and Fly Lines

In a recent interview with Variety, actor Jamie Dornan compares learning to use a whip for his upcoming role in the film “Fifty Shades of Gray” to casting a fly line. And while the crack of a fly line usually isn’t a sign of a well-laid cast, the same principle underlies both, explains Curtis Rist in an article in Discover Magazine. Physics explains it as peak energy, momentum, and velocity. Or as Joan Wulff says,  “It’s all in the arm.”