[填空题]
Four 9.5-kg spheres are located at the cori mznz;lh 3s).:4knz jners of t*-.sm )u7.css47x kmip kirha square of side 0.60 m. Calculate the magnitude and direction of the total gravitational force exerted on one sphere by the othe7iuhm4.t*rkms- 7kscx.i)p sr three. $\times 10^{-1} \mathrm{~N} \text { at }$ $^{\circ}$
