[填空题]
A person has a reasonable chance of survivinj6 lo*4v6sez (r6yih3ub ek8 q+as cy/y*qb y6g an automobile crash if the de4cg pjl*3w3w,ya )l paceleration is no more than 30 " g 's." Calculate th)*lcpwg,yaw43ja 3p le force on a 70$-\mathrm{kg}$ person undergoing this acceleration. What distance is traveled if the person is brought to rest at this rate from 100 $\mathrm{~km} / \mathrm{h}$ ?
