文档介绍：THE SIMPLE PENDULUM: A CLASSIC CASE STUDY
The purpose of the simple pendulum is to research the factors of period and
20
8
95
30
20
Now, we should analyze these data. First of all, we look at the number 1 to
number 5. We just use a copper bob. In other word, we can’t change the mass of
pendulum bob. From number 1 to 3, only the angle is changed. When we change
another bob, the time has no change. We can say that maybe the angle is not the factor,
but we should have a father analysis. Compared number 3, number 4 and number 5,
we find that the time changes with the changing of length of bob. So, we can have a
conclusion that the length of bob is one of the factors. At present, we will explore the
connection between the mass and period. So we keep the angle and length constant
and change the bob, an iron bob. Taking the data of number 3 and number 6 together,
we can obviously see the time is same (just has a little difference). We also could put
number 2 and 7 or number 1 and 8 together, the time is not change. From the above
analysis, we may have a conclusion only the length of string is the factor which can
change the period of the simple pendulum. In order to let us have a clearer feeling, we
draw some graphs.