[填空题]
An elevator in a talgblsw )t(d3(mfh1b( v l e+r efnsa6)e bk 642iv5/ nwukbuilding is allowed to reach a maximum speed of 3.5 $\mathrm{~m} / \mathrm{s}$ going down. What must the tension be in the cable to stop this elevator over a distance of 2.6 m if the elevator has a mass of 1300 kg including occupants?
