Question

Why swimmer swims easier in seawater than river water?

Answer 1

the salt dissolved in sea water is more dense so we can swim easier in salt water.
object can float easily in sea water.

Answer 2

river water flows towards single direction. Force is applied only at o e side. But in sea the water do not apply force towards o ky one direction. Force is same at all the sides perpendicular to the surface of the sea. Hence it easy to swim i. Sea water than river water.