M3-4: Scalar & Vector Quantities and Motion

Question 1

The sum of two or more vectors is called

Answer 1

resultant vector

Question 2

is defined as a change in position with respect to a frame of reference.

Answer 2

motion

Question 3

An object is _________ if its position relative to a fixed point is changing. Even things that appear to be at rest move.

Answer 3

moving

Question 4

is usually described as the total path length

Answer 4

Distance

Question 5

is usually described as the total path length

Answer 5

Distance

Question 6

It is a scalar quantity, which means that distance is expressed as magnitude only.

Answer 6

Distance

Question 7

on the other hand, is the measure of how far an object has moved in a particular direction from its original position.

Answer 7

Displacement

Question 8

Distance

Answer 8

Displacement

Question 9

is a vector quantity. This means that displacement is expressed as magnitude with the corresponding direction.

Answer 9

Displacement

Question 10

is how fast an object is moving.

Answer 10

speed

Question 11

is speed in a given direction.

Answer 11

velocity

Question 12

Constant velocity means both constant s_____ and constant d______

Answer 12

constant speed and constant direction

Question 13

Constant direction is a _________- line, so constant velocity means motion in a straight line at constant speed

Answer 13

straight

Question 14

If either the speed or the direction (or both) is changing, then the velocity is

Answer 14

changing velocity

Question 15

the rate at which the velocity is changing

Answer 15

acceleration

Question 16

applies to decreasing or increasing velocity.

Answer 16

acceleration

Question 17

is negative acceleration

Answer 17

deceleration

Question 18

The following should be noted when analyzing acceleration problems:

When the object starts from rest, its initial velocity is z____.

When the object comes to stop, its final velocity is z_____.

When the object starts from rest and moves, its acceleration is p_____.

When the object is already moving then stops, it acceleration is n_______.

Answer 18

The following should be noted when analyzing acceleration problems:

When the object starts from rest, its initial velocity is zero.

When the object comes to stop, its final velocity is zero.

When the object starts from rest and moves, its acceleration is positive.

When the object is already moving then stops, it acceleration is negative.

Question 19

always refers to acceleration in the direction opposite to the direction of the velocity.

Answer 19

Deceleration

Question 20

always reduces speed.

Answer 20

Deceleration

Question 21

, is acceleration in the negative direction in the chosen coordinate system

Answer 21

negative acceleration

Question 22

occurs when an object’s velocity changes by an equal amount in every equal time.

Answer 22

Constant acceleration