the bodies of birds and fishes must have evolved to shape which would make them not to loose much energy in over coming
a)rolling friction
b)static friction
c)sliding friction
d)Fulid friction
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Answer:
Birds and the fishes have to move about in fluids all the times. Their bodies must have evolved to shapes which would make them not to lose much energy in overcoming friction. Such shapes are called streamlined. Cars are also designed so that their shapes resemble the streamlined shapes of birds, fishes, etc.
Answer:
sliding friction
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