Test 1

Question 1

how do we define velocity in words

Answer 1

rate of change of position

Question 2

which type of graph can we find velocity as the slope

Answer 2

position vs time

Question 3

what quantity does the area under a velocity vs time graph represent

Answer 3

displacement

Question 4

what quantity can we find as the slope of velocity vs time

Answer 4

acceleration

Question 5

definition of acceleration

Answer 5

rate of change of velocity

Question 6

what are the three ways that acceleration can change the velocity vector

Answer 6

magnitude
direction
both

Question 7

what quantity does area under an acceleration vs time graph represent

Answer 7

change in velocity

Question 8

if you have zero acceleration, what is the slope of the velocity vs time graph, what is the slope of the position vs time graph

Answer 8

linear

Question 9

if you have non zero acceleration, what is the slope of the velocity vs time graph

Answer 9

linear

Question 10

area under a velocity vs time graph is

Answer 10

delta X

Question 11

slope of a velocity vs time graph is

Answer 11

acceleration

Question 12

what is a vector

Answer 12

speed
direction
ex= velocity

Question 13

for motion diagrams, dots further apart=

Answer 13

object moving faster

Question 14

for motion diagrams, dots closer together=

Answer 14

object moving slower

Question 15

long arrow in motion diagram=

Answer 15

faster motion

Question 16

short arrow in motion diagram=

Answer 16

slower motion

Question 17

constant velocity motion diagram

Answer 17

dots evenly spaced and arrows same length

Question 18

acceleration motion diagram

Answer 18

dots get farther apart as object moves faster and velocity arrows get longer

Question 19

deacceleration motion diagram

Answer 19

dots get closer together as object slows down and velocity arrows get shorter

Question 20

when is velocity slope

Answer 20

position vs time graph

Question 21

if delta X is getting smaller, what happens to velocity

Answer 21

gets smaller and smaller

Question 22

what do curves mean in a position vs time graph

Answer 22

indicates change in velocity

Question 23

can you have a positive acceleration and be slowing down

Answer 23

yes

Question 24

can you have a negative acceleration and being speeding up

Answer 24

yes

Question 25

how can acceleration cause velocity changes

Answer 25

numeric value direction both

Question 26

when accelerating, velocity and acceleration vectors are

Answer 26

same direction

Question 27

when decelerating, velocity and acceleration vectors are

Answer 27

opposite direction

Question 28

for a motion diagram, when moving to the left you have a

Answer 28

negative velocity

Question 29

for a motion diagram, when moving to the right you have a

Answer 29

positive velocity

Question 30

for a motion diagram, if you throw something up, what is true about its velocity and position

Answer 30

both are positive

Question 31

what is the acceleration during free fall

Answer 31

gravitational acceleration 9.8 m/s^2

Question 32

what direction do we assign acceleration

Answer 32

downward 9.8 downward

Question 33

when something in the air, what happens to velocity and acceleration

Answer 33

velocity changes, but not acceleration

Question 34

because of symmetry, what happens to time up and time down

Answer 34

if object returns to same height it started then time up=time down

Question 35

how do you solve for free fall

Answer 35

find t(top)- time to y(max) find y max find t down find velocity average

Question 36

sign for vectors in Q1

Answer 36

positive

Question 37

sign for vectors Q2

Answer 37

negative

Question 38

sign for vectors Q3

Answer 38

positive

Question 39

sign for vectors Q4

Answer 39

negative

Question 40

what is acceleration assigned to x direction (projectile)

Answer 40

0 m/s^2

Question 41

what is acceleration assigned to y direction (projectile)

Answer 41

9.8 m/s^2 down

Question 42

what is the total velocity of a projectile

Answer 42

combined velocities of the x and y - never zero unless it hits the ground

Question 43

when we launch something at an angle, what is the first thing we do with the initial velocity (projectile)

Answer 43

break initial velocity into components

Question 44

at what point in the path does vy=0 for projectile

Answer 44

at the top of the path

Question 45

what path shape does projectile take

Answer 45

parabolic

Question 46

what happens to the velocity in the y direction when something is thrown in the air (projectile)

Answer 46

slows down comes to a stop begins to speed up in downward direction

Question 47

what is a projectile

Answer 47

object moving in two dimensions under only the influence of Earth's gravity

Question 48

if launched straight up in projectile, what is angle

Answer 48

90 degrees

Question 49

if launched horizontally in projectile, what is angle

Answer 49

0 degrees

Question 50

in projectile, when are you moving the fastest

Answer 50

when something is launched

Question 51

what are the signs for velocity and acceleration when an object is slowing down

Answer 51

negative v positive a

Question 52

what are the signs for velocity and acceleration when an object is speeding up

Answer 52

positive V and positive A negative V and negative A