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HELP!怎么用phyphox测量斜面上的μ和合加速度,我们已经完成了初步编程,但是在实验过程中数据太差了,还有很大的误差 Angel
What exactly do you mean by “μ”: static or dynamic friction – and what is your setup/experiment idea?
First, there is no dedicated “without g” sensor, it is a so-called fusion sensor typically based on accelerometer, gyroscope, and magnetometer. This could end up in some offset (depends on sensors, implementations and perhaps more).

Then, there should not be too much noise (vibrations etc.) generated by your setup. Smooth wheels and axles, for instance, help.

The acceleration that you would like to obtain should be ideally significantly larger than any other effects. If not, you need at least considerable time periods with (almost) constant acceleration and some post-processing (in the best case averaging), in order to get meaningful results.

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