[填空题]
A person has a reasonable chance of surviving an automobile crasc vjn4.bx r20wh if the d7zz8*rm g:-plm p9 +jet :cpwpeceleration is no more than 30 " g 's." Calculate the force on a8e:g+w l*9-7pzt cmj p:rzmp p 70$-\mathrm{kg}$ person undergoing this acceleration. What distance is traveled if the person is brought to rest at this rate from 100 $\mathrm{~km} / \mathrm{h}$ ?
