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 1/49.
Distance Power
2.5m 400%1600%
5m 200%400%
10m 100%
20m 50%25%
30m 25%11.11%
40m 12 6.5%25%
50m 6.25%4%