Motion Unit

Question 1

whenever you describe something that is moving, you are comparing it to something that is

Answer 1

stationary

Question 2

the object that is used for comparison is called a

Answer 2

frame of resistance

Question 3

frame of resistance

Answer 3

a group of objects which are considered to be not moving with respect to one another

Question 4

the motion of any object could be described as both ______

Answer 4

moving and non moving (depending on the frame of resistance used)

Question 5

distance is

Answer 5

the length of the path taken between two points

Question 6

displacement

Answer 6

is the direction from a starting point and the length of a straight line from starting to ending points

Question 7

distance, if not a straight line…

Answer 7

will be longer than displacement

Question 8

speed

Answer 8

the rate @ which something moves

Question 9

speed formula

Answer 9

distance/time

Question 10

constant speed

Answer 10

when things move at the same speed for a period of time

Question 11

average speed

Answer 11

total distance divided by a total time even when an object has a changing speed (distance/time)

Question 12

instantaneous speed

Answer 12

the speed at a particular moment

Question 13

velocity

Answer 13

speed + direction. expressed as a vector

Question 14

30 mph is a

Answer 14

speed

Question 15

30 mph east is a

Answer 15

velocity

Question 16

vectors are represented by

Answer 16

arrows

Question 17

the length of the arrow represents the

Answer 17

speed

Question 18

the longer the arrow, the ___ the speed

Answer 18

greater

Question 19

the direction of the arrow represents the

Answer 19

direction of travel

Question 20

vectors may be ___ or ____ by

Answer 20

added or subtracted. by placing them tip to tail

Question 21

if vector arrows are in the same direction

Answer 21

add

Question 22

if they are in opposite directions

Answer 22

subtract

Question 23

the graph is known as a velocity graph because

Answer 23

you can determine the velocity from the graph

Question 24

the steeper the slope on the graph..

Answer 24

the faster the object is moving

Question 25

any straight line means the object is moving at..

Answer 25

a constant velocity during that time period

Question 26

to calculate velocity from the graph

Answer 26

select a segment on the graph determine the distance and time of the segment use the formula (distance/time w direction= velocity)

Question 27

what is the formula for determining velocity

Answer 27

(distance/time w direction= velocity)

Question 28

acceleration

Answer 28

the rate of change in velocity. expressed as a vector

Question 29

3 things that indicate acceleration

Answer 29

1. an object speeds up 2. object slows down 3. object changes direction

Question 30

how to calculate velocity from a distance & time graph

Answer 30

end d- start d/ end t- start t

Question 31

straight lines (---) on a d vs. t graph are

Answer 31

stopped, slowest speed, and are not moving forward or backwards

Question 32

all lines have a constant velocity except

Answer 32

---------

Question 33

distance=

Answer 33

speed x time

Question 34

speed=

Answer 34

distance/time

Question 35

time=

Answer 35

distance/speed

Question 36

difference between speed & velocity

Answer 36

speed is the rate of travel. velocity is the rate of travel with a direction