Which of the following is correct in designing an experiment in studying how the time of fall of a ball depends on its height?Explain.
A . Measure the time of fall of the same ball dropping from 1m and 2m respectively.
B . Measure the time of fall of two identical balls dropping from 1m and 2m respectively at the same time.
(Please type in English , Thanks .)
請問 ....
2006-10-30 3:57 am
回答 (1)
2006-10-30 4:18 am
✔ 最佳答案
B is correct. The experiment should be conducted at the same time to ensure all the variables are the same. If the experiment is carried out at different time, the wind speed, air resistance or other variables may be different. Therefore it is more accurate to perform the experiment at the same time.
參考: I am a senior form science student
收錄日期: 2021-05-02 20:29:01
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