What we feel on the earth is the composition of the gravitational acceleration and centrifugal action of earth’s rotation.

The gravitational acceleration varies with latitudes as shown in the figure. You feel lighter when standing on the equator. The gravitational acceleration is about 9.78 m/s^2.

In fact, it is not so difficult to obtain the gravitational acceleration experimentally.

Make a simple pendulum, and take the period of the motion. You can find more time for the period if you experiment it at a low gravity place.