FORCE DEFINEDPush or PullRubBlow or Impactgcauses change in motion or shape of a body

Kinetics - forces

bouyancycentripetalelasticfluid dragfluid lift

frictiongravitymusclepressurereaction

PROPERTIES OF A FORCE1. M_____________

2. D______________

3. P A______________

4. L A_______________

MASS

Scalar quantitycommon to solids, liquids, gasesmeasure of INERTIAdirect relationship between Mass & InertiaMass and Size NOT always directMass is NOT a Force

WEIGHT

VectorWeight is a Forcemeasure of force of g pulling downward direct relationship between Weight & Mass

VOLUMESpace that an object occupiesLength, Width, HeightNO 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 objectMass per unit of volume

Examplewater = 9.90 Newtons per liter air = 0.01 Newtons per liter

CENTER of GRAVITY

Center of Mass of an object or bodypoint where Mass is concentratedbalance point See Figure C.2 on page 82tooth pick on rim of glass

VECTORS

VECTOR COMPOSITIONIdentify Resultant Magnitude & Directione.g. net force, velocity, acceleration, etc.Using Trigonometrye.g. Pythagorean theorem

VECTOR RESOLUTION

Resultant is KNOWNFind the 2 components that comprise RSteps:

1. draw given vector to a selected scale

2. from vector tail, draw horizontal line & line3. from head, connect lines to form a rectangle