本题目来源于试卷: newnewnewnew，类别为 IB物理学
[问答题]
Would a spring scale car ,3-1 ocr,z.nc0 gvfcqn ujm(fried to the Moon give accurate results if t butadh9my b ty49z8ie73quah ;1(w8ahe scale had been caliz; 7 a9u9yduahwm88haittey31q bb (4brated (a) in pounds, or (b) in kilograms?
参考答案: Only the pounds reading would be correct. The spring scale works on the fact that a certain force (the weight of the object being weighed) will stretch the spring a certain distance. That distance is proportional to the product of the mass and the acceleration due to gravity. Since the acceleration due to gravity is smaller by a factor of 6 on the moon, the weight of the object is smaller by a factor of 6, and the spring will be pulled to only one-sixth of the distance that it was pulled on the Earth. The mass itself doesn’t change when moving to the Moon, and so a mass reading on the Moon would be incorrect.
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