Kognity IB Physics A.0 Measurements & Uncertainty (id: b56f9bbaf)

[单选题]
The masses and weights of different objects arex-1bmactq 9luu b2sr,63;otz independe:edsx/ w:z xy)ntly measured. The graph is a plot of weight vwz)d /x:: yexsersus mass that includes error bars.

What do these experimental results suggest?

A. The weight of an object is inversely proportional to its mass.
B. The measurements show a significant random error but small systematic error.
C. The measurements show a significant systematic error but small random error.
D. There is no correlation between the weights and the masses of the objects.


参考答案:  C


本题详细解析:
We know that the line should, theoretically go through (0,0)fkgzej6 -l;;xewdxg 02 sxl )- as mass and weight are directly proportional. However it does not, so there is a systematic error. On the other hand the points0;zxge6jkdl-exs)fg -;2x lw all sit on a straight line which shows there is no appreciable random error. Hence C is correct.