Question

Underwater divers wear fin-like flippers on their feet to . swim easily in water.

Answer 1

Answer:

because to avoid friction and pressure

Answer 2

Answer:

Explanation:

this concept is based on the pressure concept .if a large force acts on a small area the area will obtain pressure ad vice versa .as fin like flippers reduce pressure as more force acts on larger area.thus it helps swimmer to  experience less pressure and these fin like flapper idea is obtained from frog it helps the swimmer to push a large amount of water(action force) to experience the reaction force which helps to swim .the reaction force acts on a large area  so it helps to recieve less pressure to swimmer