Flashcards in Chapter 1 Deck (44)

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1

## How is physics an experimental science?

### It involves measurements and experiments

2

## What would a pattern be?

### a physical theory

3

## What is a physical law?

### A theory that held true

4

## How should you solve a physics problem?

### Find givens and what you need to find, set up the equations, execute by plugging numbers and solving, and evaluate the results

5

## What are the 3 fundamental quantities of physics?

### Length, time, and mass (meter, second, and kilogram)

6

## What is the purpose of significant figures?

### Finding uncertainty in a measument

7

## What can scientific notation be useful for?

### Indicating the number of significant figures

8

## What is the rule for an even number followed by a 5?

### It stays the same

9

## What is the rule for an odd number followed by a 5?

### it rounds up

10

## When doing math, what kind of sig figs get priority?

### The least number of sig figs. In addition/subtraction you use the least number of decimals

11

## What is an order of magnitude?

### A quick calculation for a general idea

12

## How does an oder of magnitude work?

### You compare 2 numbers in scientific notation to the square root of 10 and round

13

## What is the square root of 10?

### 3.167

14

## What is accuracy?

### The closeness to a true value

15

## What is precision?

### The number of sig figs used

16

## What is a scalar?

### A quantity specified without direction

17

## What is a vector?

### A quantity specified that does have direction. It's specified as force and velocity

18

## What are equal vectors?

### Vectors with equal magnitude and direction

19

## What is a negative vector?

### A vector with opposite direction but the same magnitude

20

## How do you add vectors graphically?

### put them head to tail. They're commutative

21

## How do you subtract vectors graphically?

### Put them head to head

22

## What is an accurate way to add vectors?

### Trigonometyry

23

## What is a unit vector?

### A vector with a magnitude of 1 with no units. You use them with x/y/z to do cartesian coordinates

24

## How does a scalar dot product work?

### Foiling their unit vectors

25

## What quantity usually serves as a vector's magnitude?

### Length

26

## What is the direction of a vector?

### Its angle

27

## What is the angle between 2 parallel vectors?

### 0 degrees

28

## What is the angle between 2 antiparallel vectors?

### 180 degrees

29

## How does multiplication with scalar quantities effect a vector?

### It changes its magnitude but not direction. Direction is only changed when the scalar is negative

30

## What is the Y component of a vector?

### A x Sin (angle)

31

## What is the X component of a vector?

### A x Cos (angle)

32

## How do you find the magnitude of angle A?

### sqrt(Ax^2 + Ay^2)

33

## How do you find the angle of a vector with its components?

### arctan (Ax/Ay)

34

## The components can be ____ or ____

### Positive or Negative

35

## What determines the signs of the components?

### The angle

36

## How do you add vectors with components?

### You add the X and Y components, use the Pythagorean theorem, and then take the arctan of the components

37

## What does ihat indicate?

### The x components

38

## What does jhat indicate?

### The y components

39

## What does khat represent?

### The z components

40

## What does the dot/scalar product provide?

### A scalar result

41

## What is the dot product formula?

### Vector A x Vector B=AB x Cos (Chi)

42

## When is the scalar product negative?

### When the angle is larger than 90 degrees

43

## What is the scalar product of 2 perpendicular vectors?

### 0

44