Even if they did, most people don’t really grok what that means. Most people’s mental models for reference frames are intertial and without transition, so the idea that they’re still travelling at the speed of the boat, say, when they hit the water, and not the speed of the water, doesn’t make intuitive sense to them.
They left the boat. To them, that means they’re no longer moving with the boat.
Did none of these people watch Bill Nye??
Even if they did, most people don’t really grok what that means. Most people’s mental models for reference frames are intertial and without transition, so the idea that they’re still travelling at the speed of the boat, say, when they hit the water, and not the speed of the water, doesn’t make intuitive sense to them.
They left the boat. To them, that means they’re no longer moving with the boat.