The inverse square law, which means that, just like gravity sound and light, the strength of your TK rapidly weakens the farther away your target is.

https://en.wikipedia.org/wiki/Inverse-square_law

> The inverse-square law, in physics, is any physical law stating that a specified physical quantity or intensity is inversely proportional to the square of the distance from the source of that physical quantity. The fundamental cause for this can be understood as geometric dilution corresponding to point-source radiation into three-dimensional space (see diagram).

Notice how at 30 meters, the TK power isn't 1/3 of the 10 meter power, it's 1/4.

    Distance  Power
      2.5m    400%
      5m      200%
     10m      100%
     20m       50%
     30m       25%
     40m       12.5%
     50m        6.25%

 

[![enter image description here][1]][1]


  [1]: https://i.sstatic.net/dcGwy.png