Lesson 1

Question 1

Physics

Answer 1

The science that describes and explains the nature and behavior of physical systems

Question 2

Sir Isaac Newton

Answer 2

1642-1727. Mathematician and Physicist, one of the most influential scientists of all time.

Question 3

Kinematics

Answer 3

Branch of mechanics that deals with the description of motion.

Question 4

The Metric System

Answer 4

International system of weights and measurements based on meter-kilogram-second

Question 5

Dimensional Analysis

Answer 5

The analysis of the relationships between different physical quantities by identifying their fundamental dimensions and units of measure.

Question 6

Significant Figure

Answer 6

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.

Question 7

Vector

Answer 7

A quantity that has both magnitude and direction.

Question 8

Scalar

Answer 8

A number

Question 9

Scalar Multiplication

Answer 9

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.

Question 10

Unit Vector

Answer 10

A vector length equal to one. î=x, ˆj=y

Question 11

A=

Answer 11

ax(î)+ay(ˆj)

Question 12

Speed

Answer 12

Not a vector

Question 13

Dot Product (Scalar Product)

Answer 13

ÂxˆB=ABcosø