Question for TWU Prof
How far does the ball slide on the strings?
We are really confused about this in the Instruction forum. I see numbers like 1/4 inch, 3.5 cm, several inches, etc. and Wilson shows big string displacement in its videos.
Second question: what is the relation between ball slide distance and string displacement.
What is the effect of string type and tension on these numbers?
As to time on strings, that too depends. 5 ms is a good average. It can be as long as 7 ms in the throat and as short as 4 ms at the tip. Again, it will depend on effective mass at the hitting point as well as string stiffness at that location (clamped racquets essentially have "infinite" effective mass). But in general, 5 ms is a very good approximation.
Thanks a lot
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