[填空题]
An elevator in a tall buil l2ac 2b ip2 dclik0-elc8ao21dingxfz 8:/5;uk/tns+nr*i qgo lp.va5e t 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?
