1 Many instances of performance-based design are approved for their adherence to safety principles. 2  Ceremony implies honor, and honor implies an adherence to traditions. Many instances of performance-based design are approved for their adherence to safety principles. 2  Ceremony implies honor, and honor implies an adherence to traditions.
Acceleration is a vector quantity that is defined as the rate at which an object changes its velocity. An object is accelerating if it is changing its velocity. Sports announcers will occasionally say that a person is accelerating if he/she is moving fast. Yet acceleration has nothing to do with going fast.
A mathematical definition for acceleration is the velocity rate of change (its derivative). In the real world is easy to concretize the idea if you think in a car moving. If you accelerate/break, the speed will change positively/negatively. In the physical world, acceleration is the effect of applying forces in bodies.