根据家谱，用适当的单词完成短文。

　　Hello, my name is Mary. This is my 1._____ tree. These 2._____ my

grandparents. Those are my parents. My 3._____ name is Tom Smith. My

mother's 4._____is Mona Green. Frank is my 5._____. He 6._____ a student.

Bob Smith is my 7._____. Ben is his 8._____. And Ben is my 9._____. He is a

student, too. He is 10._____ at English.

一辆汽车以v₀=1m/s的初速度，a=2m/s²的加速度做匀加速直线运动，求：

（1）汽车在第1s末的速度v₁的大小是多少？

（2）在第2s内的位移X₂的大小是多少？