试题与答案

跳伞运动员做低空跳伞表演,他离开飞机先做自由落体运动,下落8s后打开降落伞,伞张

题型:问答题

题目:

跳伞运动员做低空跳伞表演,他离开飞机先做自由落体运动,下落8s后打开降落伞,伞张开后运动员就以5m/s2的加速度做减速运动,最后以10m/s的速度匀速经过2s着地.(g取10m/s2

(1)画出整过程中运动员运动的v-t图象

(2)求出运动员离开飞机时离地面的高度.

答案:

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