The sweet spot is a place where a combination of factors results in a maximum response for a given amount of effort.
In tennis, squash, racquetball, baseball, cricket or golf a given swing will result in a more powerful hit if the ball strikes the racket, bat or club on the latter's sweet spot.
The sweet spot is the location at which the object being struck, usually a ball, absorbs the maximum amount of the available forward momentum and rebounds away from the racket, bat, club, etc.
with a greater velocity than if struck at any other point on the racket, bat or club.
[4] Scientific research conducted at the University of Cambridge discovered that bamboo bats are stronger with a better sweet spot compared to those made of willow.