Question

18.11: Why does a diver change his body
positions before and after diving in the pool?
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Answer 1

Answer:

A diver changes his body position before and after diving to increase his angular velocity.

Explanation:

Mathematically : As we know that,

v=rw

v/r = w

Where ‘w’ is inversely proportional to ‘w’  

Angular velocity ‘w’ increases as the radius ‘r’ of a body decreases.A diver reduces radius of his body Bh bringing close