Chapter 7 Motion at High Speed

Question 1

The idea that motion is only defined relative to other objects, which may have their own motion. There is no such thing as an “absolute” motion measured against objects that are absolutely at rest.

Answer 1

Relativity

Question 2

A state of motion that is experiencing no acceleration.

Answer 2

Inertial frame of reference

Question 3

A state of motion that is undergoing an acceleration.

Answer 3

Non-inertial frame of reference

Question 4

The notion that a final speed vector can be computed by directly adding all individual velocity vectors together according to the rules of Euclidean feometry.

Answer 4

Galilean Relativity

Question 5

The theory of how objects in inertial frames of reference behave at high speeds.

Answer 5

Special theory of relativity

Question 6

A siruation of logic contrived to illustrate a particular effect.

Answer 6

Gadanken Experiment

Question 7

The slowing of a clock as its speed approaches the speed of light as measured by an observer not moving with the clock.

Answer 7

Time Dilation

Question 8

The shortening of an object along its direction of motion as its speed approaches the speed of light, as measured by an observer not moving with the object.

Answer 8

Length Contraction

Question 9

Space and time connected together into one continuum by the special theory of relativity.

Answer 9

Spacetime