怎么在斜面上测量合加速度和μ

[林烨大宝贝]

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

[Jens Noriʇzsɔɥ]

What exactly do you mean by “μ”: static or dynamic friction – and what is your setup/experiment idea?

[林烨大宝贝]

动态的，我们想要利用手机传感器测得沿斜面的加速度。我们利用到了phyphox的不含g的加速度传感器，并代入公式计算，但测得结果并不精确。

[Jens Noriʇzsɔɥ]

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.