C4 Terms Flashcards Preview

Physical Science > C4 Terms > Flashcards

Flashcards in C4 Terms Deck (86)
Loading flashcards...
31

Things that have ______ as well as ________ are called vector quantities.

size
direction

32

Name some vector quantities.

velocity, force, momentum, position in space, acceleration

33

The _______ moved in a given ________ is called displacement.

distance
direction

34

Distance and displacement are identical quantities. (T or F)

F

35

Velocity and speed are the same. (T or F)

F

36

Speed in a specified direction is called __________.

Velocity

37

Distance divided by time defines ________.

speed

38

Displacement divided by time defines _______.

Velocity

39

Imagine that Bob ran around his school starting at the front doors. The total distance from start to finish in front of his school was 700 m. It took Bob 100 seconds to complete the run. What was his average speed? What was his average velocity?

speed–7 m/s
velocity–0 m/s (his displacement was zero)

40

Acceleration is the technical name for speed. (T or F)

F

41

The rate of change of velocity in a given time interval is called __________.

acceleration

42

A negative change in acceleration is called_________.

Deceleration

43

What is deceleration?

a negative change in acceleration

44

Can a car traveling cross–country have a constant velocity?

no. speed limits change often and stop lights and bathroom brakes interfere and disrupt your velocity.

45

Spatial

Describes something relating to or having the properties of space. 3 spatial dimensions - length, width, height.

46

Why are frames of reference important?

They determine how motion will be described.

47

What is the correct reference frame for a given situation?

In motion , no single reference frame is more correct than another.

48

What is best reference frame?

The frame that is most useful or makes the study of that motion easiest.

49

In physics, how is a system used?

A system helps to identify what factors must be taken into account in experiments and any scientific models developed.

50

Why are frames of reference important to the study of motion in physics?

They "anchor" observations and act as a landmark.

51

What is correct frame of reference for a given situation?

In motion, no single reference frame is more correct than another.

52

What is the best frame of reference?

The one that is the most useful or in which the study of that motion is easiest.

53

You're riding in an accelerating car that passes another car. What type of reference frame produces this kind of observed motion?

Accelerated reference frame

54

Three types of reference frames

Fixed reference frame
Accelerated reference frame
Rotational reference frame

55

Motion in a straight line, in 2 or 3 dimensions it is generally acceptable to use a ______ ______ frame in which the system of interest moves.

Fixed reference frame

56

When studying a system that revolves, it is often more convenient to choose an accelerated reference frame in which the rotating object and its axis are stationary. This is called a ________ _________ frame.

Rotational reference frame. It permits analysis of the pushes and pulls that cause the circular motion and the motions of other systems relative to the rotating system.

57

(T/F) The fact that one's point of view affects one's observations applies to many aspects of scientific investigation, including motion.

True

58

Continuum

Unbroken expanse or series.

59

What is another name for the magnitude of the velocity vector?

Speed

60

How many position coordinates are required to identify the position of a system undergoing 1 dimensional motion?

1