Lesson 1 Flashcards
(13 cards)
Physics
The science that describes and explains the nature and behavior of physical systems
Sir Isaac Newton
1642-1727. Mathematician and Physicist, one of the most influential scientists of all time.
Kinematics
Branch of mechanics that deals with the description of motion.
The Metric System
International system of weights and measurements based on meter-kilogram-second
Dimensional Analysis
The analysis of the relationships between different physical quantities by identifying their fundamental dimensions and units of measure.
Significant Figure
Each of the digits of a number that are used to express it to the required degree of accuracy, starting from the first nonzero digit.
Vector
A quantity that has both magnitude and direction.
Scalar
A number
Scalar Multiplication
The multiplication of a vector by a scalar; the magnitude of a vector is scaled according to the scalar, but the direction remains the same.
Unit Vector
A vector length equal to one. î=x, ˆj=y
A=
ax(î)+ay(ˆj)
Speed
Not a vector
Dot Product (Scalar Product)
ÂxˆB=ABcosø