Why it is easy to swim in a swimming pool than river?

Answer 1

In a river,flowing water exerts a force on the swimmer. To cross the river or to swim upstream the swimmer has to overcome this resistive force. This requires spending a lot of energy.

As there is no flow of water in a swimming pool, the swimmer does not have to overcome the resistive force as in river. Hence it is easier to swim in swimming pool than in a river.

Answer 2

Because of the salt in it. Fresh water of 10 degrees Celsius has a density of 999.728 kilograms per cubic meter. Seawater of 10 degrees Celsius and of 3.5 % salinity has a density of 1026.978 kilograms per cubic meter.

Answer 3

It is because the salt dissolved in the seawater makes it thicker or denser than the water in swimming pool. As a result, you will not sink so easily. In fact if you go to the Dead Sea in the Jordan valley you will be not able to sink at all. This is because of the extremely high concentration of dissolved mineral salts in the water, which will keep your body bobbing like a cork

Answer 4

The ocean contains dissolved salt, therefore its density if higher than the fresh water in a river. It is easier to swim in higher density liquids because you float better as less water needs to be displaced to allow you to remain on the surface of the water.

Answer 5

Your bodies density is the same whether you are in seawater or freshwater but the actual density of the water itself is greater in the seawater because with the salt in there there are more particles of substance packed into one area. One of the elementary rules of density is that the denser object will sink faster than the less dense one.

You can look at it like a fraction...

Say your density is 20 units and the density of saltwaters is 60 and freshwaters is 50.

20/50 = rate that you sink in the freshwater

20/60 = rate that you sink in the saltwater

20/50 > 20/60 so the rate that you sink in freshwater is greater than the rate that you sink in saltwater.

Density = Mass / Volume

Mass is determined by the effect of gravity on an object. The higher up you go the weaker gravity goes and if gravity gets smaller than so does mass. A smaller mass divided by the same volume gives you a smaller number, hence the decrease.

Answer 6

Salt water is denser and, therefore, more buoyant than fresh water so less of your energy is expended keeping afloat, and more is used to propel you along. Phil

Answer 7

because of the extra salt in salt water, it is denser. therefore you float better

Answer 8

Sea water is more dense (heavy) than fresh river water and thus more buoyant and holds you up - you do not need to work as hard to stay afloat