DESCENDANT WASHERS

These washers, when descended by the screw, soon reach a constant speed. they behave like a parachute, where air resistance equals acceleration due to gravity.

When the speed is constant, the displacement is proportional to the elapsed time interval. it is said that there is a linear relationship between displacement and time interval.

Linear relations are the simplest that appear in mathematical models. It is the nonlinears that generate the complications. An example is frictionless free fall, where velocity increases with time, and therefore, in this case, equal displacements are not made with equal speeds.

USEFUL LINKS

Support Page to Minitab about linear and non-linear relationships, showing how this is seen in Statistics. After all, you can see the above experiment as a statistical one, to make a straight line fit.                                                                                                                             

When the speed is constant, as with washers from a certain point, a uniform movement is characterized, which is explained in a simple and direct way in the video of Descomplica channel!                                                                                                                             

This Physics and Vestibular page explains the air resistance force, distinguishing it in terms of high and low speeds, explaining how the movement of a parachutist, for example, can be characterized as a uniform movement, as well as that of the washers.