问题 选择题

物体由静止开始做匀加速直线运动,第1s末的速度达到4m/s,第2s内物体的位移是(  )

A.2 m

B.4 m

C.6 m

D.8 m

答案

根据速度时间公式v1=at,得a=

v1
t
=4m/s2

  第1s末的速度等于第2s初的速度,所以物体在第2s内的位移x2=v1t+

1
2
at2=4×1+
1
2
×4×1m=6m.

故选C

阅读理解

Mr. and Mrs. White had two sons and three daughters.One Sunday,Mrs. White said to her husband,“The children don’t have any lessons today,and you’re free too.There’s a new funfair(游乐场)in the park.Let’s all go there to play.

Her husband said,“1 want to finish some work today. “oh, forget it.Go there and make our children happy.That’s the most important work” Mrs. White said.

So Mr. and Mrs. White took their children to the funfair.Mr. White was forty-five years old.

but he enjoyed the funfair more than his children. He hurried from one thing to another,and ate lost of sweets. One of the children said to her mother,“Dad is just like a small child,isn’t he, Mom?” Mrs. White didn’t want to follow her husband around any more at that time and answered, He is even worse than a small child,Mary,because he might spend more money than a small child.

小题1:There were ________ children in the White family·

A.two

B.three

C.four

D.five小题2:One Sunday,Mr. and Mrs. White wanted to go to _______ with their children.

A.school

B.work

C.a funfair

D.a shop小题3:Mr..White liked the place so much that he_______.

A.bought lots of sweets

B.followed his wife all the time

C.hurried from one thing to another

D.asked a lot of questions小题4:From the story we know Mrs. White________ when Mary asked her the question.

A.was still excited to play              B. was a little angry with Mr. White

C.looked for Mr..White everywhere     C. are a lot of sweets

小题5:Of all his family members,_________ enjoyed playing there most that Sunday.

A.Mr..White

B.Mrs. White

C.Mary

D.the boys

计算题