More resistance on the surface. That's why submarines go faster when submerged. Also consider that some people can kick significantly faster underwater than they can swim on the surface.
Here's an experiment to prove it. Push off from the wall and streamline and see how far you go 1. while on the surface, and 2, while under water.
More resistance on the surface. That's why submarines go faster when submerged. Also consider that some people can kick significantly faster underwater than they can swim on the surface.
Here's an experiment to prove it. Push off from the wall and streamline and see how far you go 1. while on the surface, and 2, while under water.
