"Engineers are responsible for the design, constructions and testing of the devices we use, from simple things such as chairs and pencil sharpeners to complicated ones such as dams, cars, airplanes, and spacecraft. They must have a deep understanding of the physics underlying these devices and must be familiar with the use of mathematical models to predict system behavior. Students of engineering begin to learn how to analyze and predict the bahavior of physical systems by studying mechanics. At its most basic level, mechanics is the study of forces and their effects. Elementart mechanics is divided into statics, the study of objects in equilibrium, and dynamics, the study of objects in motion. The results obtained in elementary mechanics apply directly to many fields of engineering. Mechanical and civil engineers who design structures use the equilibrium equations derived in statics. Civil engineers who analyze the responses of buildings to earthquakes and aerospace engineers who determine the trajectories of satellites use the equations of motion derived in dynamics." p1

ACCELERATION
RATE OF CHANGE OF VELOCITY OF AN OBJECT

DYNAMICS
THE STUDY OF FORCES ACTING ON OBJECTS IN MOTION

FORCE
A PUSH OR A PULL

FORCE

MASS
THE RESISTANCE OF AN OBJECT TO A CHANGE IN TRANSLATIONAL MOTION