[填空题]
Four 9.5-kg spheres arelf.mhcm9,f1)a bx.f bybz:b. located at the corners of a square of side 0.60 m. Cw0 ahm5z6z ;b 1xt( obbgb2z6xalculate the magnitude and direction of the total gravitational f6o0zzbb wxt6 xba1z5 2g;(h bmorce exerted on one sphere by the other three. $\times 10^{-1} \mathrm{~N} \text { at }$ $^{\circ}$
