very slightly it varies with altitude. https://www.mansfieldct.org/Schools/MMS/staff/hand/lawsgravaltitude.htm
If you live in a mountainous area, you can measure g by use of a pendulum, and discover the change in g from base to max altitude. It is very slight, so you have to take repeated measurements to detect the changes statistically.
https://www.mansfieldct.org/Schools/MMS/staff/hand/lawsgravaltitude.htm
How does the weight of a body varies on earth surface?
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