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

[单选题]
The masses and weighth ;hz(6n3lz5 dibx2g js ogi x 3:zw+.o yfu9o/tnf different objects are independently measured. The graph is a plot of weig/wuo+x yzfn.o:it9 g3ht versus 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, thes5yeu u 1+dvcg+36v a-wxi)a/dtp :rooretically go through (0,0) as mass and weight are directly proportional. However it does not, so there is a systematic error. On the other hand the points all sit on a straight line which shows there iagovitvya 6rx)/3 +e:du1+dps5cu w-s no appreciable random error. Hence C is correct.