Friends,
do you know how to swim? Probably you know it, if don’t know you should learn
it, this will be helpful for your life saving from drown in water, who knows
you might be a swimming champion in future also.
But you will be surprised to know that it is
easier to swim in sea than in a river, in river than a pond, in pond than a
swimming pool. What is the basic reason behind it, let's come to know.
According to Arcimidis, an object will float on liquid only when it replaces the same amount of liquid equals to its mass. For an example you take an iron ball and a plastic ball, in water iron ball will sink while plastic ball will float because iron ball is heavy and it cannot replace the same water as equal to its weight while plastic bottle can do it easily. Like that you can also float or swim in water, if you are able to replace the same amount of water equals to your body weight. When you compare sea, river, pond and swimming pool water, sea water contains most salts which makes it heavier as compared to others that means one litre sea water is heavier that river water. Therefore during swimming you will have to replace less water and doing less effort you can swim easily.
According to Arcimidis, an object will float on liquid only when it replaces the same amount of liquid equals to its mass. For an example you take an iron ball and a plastic ball, in water iron ball will sink while plastic ball will float because iron ball is heavy and it cannot replace the same water as equal to its weight while plastic bottle can do it easily. Like that you can also float or swim in water, if you are able to replace the same amount of water equals to your body weight. When you compare sea, river, pond and swimming pool water, sea water contains most salts which makes it heavier as compared to others that means one litre sea water is heavier that river water. Therefore during swimming you will have to replace less water and doing less effort you can swim easily.
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