We did an experiment, where you hang a plum bob (or any wieght hanging from a string), and in an inertial fram of reference the string will not move and just hang, but in a non inertial fram of reference the string will move due to acceleration and other forces. Hope this helps you
you could also try to use ball bearings on a flat, frictionless surface, and do calculations there. then, compare the ball bearings as u roll it, say, on a table.