ABSTRACT
Force can be exerted both statically and dynamically. It is estimated that with products in general, dynamic force exertion occurs probably more often than static force exertion. Mostly, force is exerted to create a certain effect, like opening, turning on, fastening, propelling or adjusting. By moving a handle, a knob or even the whole product, the desired effect may be obtained. Some forces are initially static, like those exerted on the lids of jam jars, but in the end the idea is that the lid should move.
