ABSTRACT
Let’s analyse a playground scenario involving a seesaw [a.k.a. teeter-totter, and more aptly, massless lever].
Example [ Massless Lever ]
Two kids, PK and NK, with masses MP and MN , respectively, are seated on a seesaw. It shall be assumed that the bar and seats are massless, and that the bar rests on a pointlike fulcrum, labelled O in Figure 45.1.
