Chapter 2

what must you be able to answer to describe an object's motion ?

• who and what

• what and how

• when and where

• where and who

An object can change position along the path of all of these EXCEPT ____.

• back-and-forth

• circle

• straight line

• dotted line

A motion diagram is a series of images of a moving object that records it position after ___.

• 1/30 s

• it comes to rest

• equal time intervals

• an acceleration

Replacing an object in a motion diagram with a single point is called the particle model

• alternative model

• frame differential

• operational definition

• particle model

The vector that represents the sum of two vectors is called the ___

• direction

• displacement

• resultant

• speed

In a coordinate system the ___ is the point at which both variables have the value zero

• origin

• magnitude

• distance

• vector

In this motion diagram the length of the arrow indicates how far the object is from the origin or its ____ from the origin

• magnitude

• position

• distance

• resultant

In this image 7 cm represents the ____.

• resultant

• origin

• scalar

• interval

Final position minus the inital positionis called ____.

• displacement

• distance

• magnitude

• time interval

A common symbol for a time interval uses the Greek letter ___ to represent a change in quantity

• alpha

• beta

• delta

• gamma