Wheels are inherently a bunch of pivoting around a fulcrum

Wheels are inherently a bunch of levers pivoting around a fulcrum.

A lever is a bar with balance point called the fulcrum. In a wheel, the fulcrum is in the centre. The fulcrum is the point against which a lever is placed. The outside rim of the wheel is like a handle of a lever.

Wheels reduce frictions, they dig into the ground and rotate ( pivot ), turning around sturdy rods called axles. They provide leverage, a cart with bigger wheels is easier to push because bigger wheels work like bigger levers, multiplying the pulling or the pushing force.

by using  production possibilities graph.  opportunity costs are key expenses in financial matters and are utilized as a part of registering money saving advantage investigation of a venture. such expenses, be that as it may, are not recorded in the record books but rather are perceived in basic leadership by processing the money costs and their subsequent benefit or misfortune.