Are you being facetious?

How about this: YOur a civil engineer working on implementing a new traffic light system for a city. In order to find the appropriet timing of the traffic lights your going to have to take the acceleration function of the flow of traffic (which would be a derivative of the function of the speed of traffic, which is in turn a derivative of the position of a given vehical) Therefore your working with a second derivative equation when finding the proper light timing.

There are many many more, but thats just the very first thing that came to mind. Calculus was actually developed in order to more accurately describe motion than algebra is capable of.

Really I could get into this hardcore, but I think I may go over your head real quick if you don't have any calc background...