[填空题]
Arlene is to walk across a "high wire" strung pd* xv42 1phrqhorizontally between bmw;2.osefof( ks4,l fqo:3m two buildings 10.0 m apart. The sag in;m lsm,sfow4bf q 3.2fo:ok(e the rope when 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?
