Chapter 2 Representing Motion Study Guide

A(n) __________ is a series of images of a moving object that records its position after equal time intervals. on

• A) frame

• B) operational definition

• C) motion diagram

• D) association

The vector that represents the sum of two or more vectors is called the __________.

• A) displacement

• B) speed

• C) resultant

• D) direction

In the particle model, the __________ of the object are (is) ignored.

• A) internal motions

• B) motion diagram

• C) position

• D) acceleration

The length of the position vector on a motion diagram is proportional to the __________.

• A) distance of the object from the origin

• B) distance of the object from the vertical intercept

• C) average speed

• D) velocity

A motion diagram is a series of images of a moving object that records its position after __________.

• A) 1/30 s

• B) equal time intervals

• C) it comes to rest

• D) an acceleration

The __________ is the point at which all variables in a coordinate system have zero magnitude.

• A) axis

• B) origin

• C) intercept

• D) coordinate system

Which of the following correctly describes the displacement of an object that moves from position d_i to d_f?

• A)Δd = d_f - d_i

• B) v = Δd/Δt

• C) Δd_f = di - df

• D) Δd = d_f + d_i

Which of the following is not a scalar quantity?

• A) 314.7 g

• B)150 km southwest

• C) 25°C

• D) 2 hours 27 minutes

To subtract two vectors, __________.

• A) reverse the direction of the second vector and then add them

• B) use the equation R2 = A2 - B2

• C) use the same process as for adding them, then change the sign of the final value

• D) subtract 180° from θ, then use the Law of Cosines

Displacement is a change in __________.

• A) speed

• B) position

• C) distance

• D) velocity