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

[单选题]
The masses and weights of different obd kcf8613aryr a1n j-b t,;;tg; b +puemmh2puxk39 clyvd0*cjects are independently measured. The graph is a pl+tp9;,cytc2p;3uvx lu;meb k hmgd* 0ot of weight 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, theoretically go through (0,0) aw wem3aem ;l-1 x3q(vwrwj:g. h3qn0xs mass and weight are directlh(lgw -:wx ;w3amx3wnqmer3v.q0 1ej y 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 is no appreciable random error. Hence C is correct.