Golf balls have the tiny little craters in it so that it would not become a smooth object and roll past a TEE marker. If the ball was round with no craters on it and you were to swing with a nine iron or something of this capatable and you were aiming say for the 18th par and you most likely would never be able to get close enough to the goal for fear of rollover and or rollby moves. Craters thus enhance the movement of the ball to land and not move and reduce the movement away from desire target.
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The dimples on a golf ball are designed to make the ball aerodynamic and fly as smoothly through the air as it can. The reason there are so many dimples as it is as many as they can fit on the golf ball to give it the best flight.
For better grip - According to the Spalding website: " There are 122 pebbles per square inch on a Spalding Basketball which is equivalent to approximately 35,000 pebbles.
Read more: How_many_dimples_on_a_basketball
Dimpled golf balls fly farther than non-dimpled balls due to the combination of two effects of lift and drag.
makes the ball go farther, due to aerodynamics makes the ball go farther, due to aerodynamics
Almost all balls used in modern hockey are dimpled. They help prevent hydroplaning when on water and keep the flight stable when in the air.
The dimples reduce hydroplaning on water-based turfs and grounds, and keep it flying straight when in the air.