Sentence:  When you hit a shot and it really feels good, you claim that you have hit the <WSD>sweet spot</WSD>. But can this feeling be quantified? ... Do some rackets have a <WSD>sweet spot</WSD> that is sweeter than that of other rackets, or is the size of the <WSD>sweet spot</WSD> the only relevant consideration? 
Meaning of the word marked with <WSD> tags:  Any of several places on a bat, racquet, etc., with which to hit a ball, resulting in the latter rebounding with some optimal desirable effect, such as minimum vibration or maximum velocity.