Question

a man first swims in sea water and then in river water .

i,compare the weigt of sea water and river water displacedby him.

ii,where does he find it easier to swim?

Answer 1

Hello,

We know that the density of the sea water is more than the density of the river water. So, the weight of displaced sea water is more than the weight of displaced river water. This weight gives the upward Buoyant force to the swimmer. Thus, the apparent weight of the swimmer is less in the sea water. Hence he finds it easier to swim in the sea water.