force defined push or pull rub blow or impact g causes change in motion or shape of a body
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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
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