Wind-Powered Car Actually Moves Faster Than Wind Speed, Answering Tricky Physics Question

From Popular Science...

"A California team recently tested a wind-powered car that can actually outrun the wind, adding more fuel to a lingering physics debate.

In a test two weeks ago, the car hit a top speed 2.86 times faster than the wind, according to its creators. Some physicists say this should be impossible, but car-builder Rick Cavallaro says that's exactly what happened on May 16. What gives?"

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