## Essential University Physics: Volume 1 (4th Edition)

$54cm$
We know that $F_x<2100N$ $\implies \frac{Mg\times 1.15}{1.4-d}<2100N$ $1.4-d>\frac{160\times 9.8\times 1.15}{2100}$ $1.4-d<0.86$ $d<1.4-0.86$ $d<54cm$