FORCE DEFINED Push or Pull Rub Blow or Impact g causes change in motion or shape of a body

Kinetics - forces bouyancy centripetal elastic fluid drag fluid lift friction gravity muscle pressure reaction

PROPERTIES OF A FORCE 1.M_____________ 2.D______________ 3.P A______________ 4.L A_______________

MASS Scalar quantity common to solids, liquids, gases measure of INERTIA direct relationship between Mass & Inertia Mass and Size NOT always direct Mass is NOT a Force

WEIGHT Vector Weight is a Force measure of force of g pulling downward direct relationship between Weight & Mass

VOLUME Space that an object occupies Length, Width, Height NO relationship with Mass Shot vs Softball Table Tennis Ball vs Golf Ball Objects of similar VOLUME but different MASS

DENSITY  Compactness of a body or object  Mass per unit of volume  Example water = 9.90 Newtons per liter air = 0.01 Newtons per liter

CENTER of GRAVITY  Center of Mass of an object or body  point where Mass is concentrated  balance point  See Figure C.2 on page 82  tooth pick on rim of glass

VECTORS

VECTOR COMPOSITION Identify Resultant Magnitude & Direction e.g. net force, velocity, acceleration, etc. Using Trigonometry e.g. Pythagorean theorem

VECTOR RESOLUTION  Resultant is KNOWN  Find the 2 components that comprise R  Steps: 1. draw given vector to a selected scale 2. from vector tail, draw horizontal line &  line 3. from head, connect lines to form a rectangle