问题 实验题

(6分)在探究“重力的大小跟什么因素有关系”的实验中,按照图甲所示,把钩码逐个挂在弹簧测力计上,分别测出它们受到的重力,并记录在下面的表格中.

甲               

(1)把右图表格中的空格填写完整;(2)图甲中弹簧测力计的示数为____________N;

(3)根据表格中的实验数据,在图乙中画出重力与质量的关系图象;

(4)由图像可知物体的      与________成正比,质量越大重力越大。

答案

(1)  400    (2)2 (3)略 (4)G  m

题目分析:通过观察表格中的数据发现,每一栏中的重力与质量的比值都是固定的数值,设表格中空白处的物理量为m,选二、三、四、六栏中的任一一组数据与第五栏中的物理量建立等式,求出空白处的数字;观察弹簧测力计的量程和分度值以及指针指示的数值,得出正确的弹簧测力计的示数;根据表格中记录的数据,在表格中描绘出点,再连成线,画出重力与质量的关系图象;分析图象,得出图中物体所受的重力跟质量的关系。

(1)由得:

(2)观察图象发现,弹簧测力计的量程是5N,弹簧测力计的分度值是0.5N,弹簧测力计指针指示的数字是2,故图甲中弹簧测力计的示数为2N;

(3)根据表格中记录的数据在表格中描绘出相应的点,再连成线;如图所示:

(4)根据表中数据可知,物体所受的重力跟质量的比值是一个定值,满足正比例函数关系,分析图象也能发现这两个量是成正比的,由此可知物体所受的重力跟质量成正比。

点评:本题展示了物体所受的重力跟质量关系的探究过程,考查学生实验数据的分析能力、作图能力以及概括能力。

阅读理解

The Wife-carrying World Championship has been celebrated in a small town in central Finland since 1992. In 1992, the people of the town decided to restart some long-forgotten traditions.  1 He was said to only accept men as members of his gang who proved their worth in challenges. At that time, it was also a common practice to steal women from neighboring villages.

   2  A large number of competitors, people, and journalists from Finland to Canada attend the Wife-carrying World Championship every year.

   3   The Wife-carrying World Championship is held on a 253.3 meters long official track. The track has two dry obstacles and a water obstacle, about a meter deep. The wife to be carried may be your own, or your neighbor’s. The minimum weight of the wife to be carried is 49 kg. If she is less than 49kg, the wife will be given a heavy bag to carry. Each time a competitor drops his wife, that couple will be fined 15 seconds.  4 

Alongside with the Wife-carring World Championship, there is also a team competition. The distance is the same but three men in the team carry the wife in turns. At the exchange point the carrier has to drink official “wife-carrying drink.” Then he may continue the race.  5 

While the Wife-carrying World Championship is being held, there are bands playing music, a wife carrying dance and other forms of entertainment.”

A.There are a few basic rules.

B.People everywhere hold the event.

C.A special prize is awarded to the team.

D.Do you know how these traditions restarted?E.This event is becoming increasingly popular.

F.The winner is the couple who complete the course in the shortest time.

G.Back in the late 1800s, there was a robber called Rosvo-Ronkainen in that area.

判断题