[填空题]
Arlene is to walk across a "high wire" strung horizontallys i6ni*wy: m+gxkzdwo3t :7u) ov ebocotka6a zi:9c 7:)k8 0i between two buildings 10.0 m apart. The sag in the rope whe: :a 6to9a7cek)0k8boiiozc v n she is at the midpoint is 10.0$^{\circ}$ as shown in Fig. 4-42 . If her mass is 50.0 kg , what is the tension in the rope at this point?
