[填空题]
During a Chicago storm, winds can whip horizontally at speeds of 1x pf64s,:d3 yq cwb8gz00km/h If the xfy3,8wzd:pqc6b g4s 0 n xklm pzr1 5+-ckcvav1pr48air strikes a person at the rate of 40kg/s per square meter and is brought to rest, estimate the force of the wind on a person. Assume the person is 1.50 m high and 0.50 m wide. Compare to the typical maximum804cv+p -mkkarrpn 5lx 1z cv1 force of friction $\mu\approx1.0$ between the person and the ground, if the person has a mass of 70 kg. N
$F_{on person}$ $F_{fr}$