unit 2

Question 1

change in an objects position relative to a reference point

Answer 1

motion

Question 2

coordinate system in which the position of the object is measured

Answer 2

frame of reference

Question 3

distance and direction of the objects change in position

Answer 3

displacement

Question 4

the location of an object in relation to a ref. point

Answer 4

position

Question 5

the distance an object travels per unit of time

Answer 5

speed

Question 6

what is any change over time?

Answer 6

a rate

Question 7

what is the speed equation?

Answer 7

speed(m/s) = distance(m)/ time (s)
s = d/t

Question 8

what is constant speed?

Answer 8

when an object neither speeds up or slows down

Question 9

what are terms for changing speed?

Answer 9

average or instantaneous speed

Question 10

what is average speed?

Answer 10

total distance travelled by total time travelled

Question 11

what is instantaneous speed?

Answer 11

how fast an object is moving at 1 point in time

Question 12

when graphing motion, what goes on the x and y axis? what represents the slope?

Answer 12

time - x axis
distance - y axis
speed

Question 13

speed of object and direction of motion

Answer 13

velocity

Question 14

can velocity change if the speed stays the same?

Answer 14

yes

Question 15

true or false:

2 objects cannot have the same speed and different velocities

Answer 15

false; they can

Question 16

what causes the movement of earth’s landmasses and oceans?

Answer 16

movement of earths plates

Question 17

what effects how we describe motion?

Answer 17

moving reference point

Question 18

what 2 factors always depend on the point of ref. chosen?

Answer 18

velocity and position

Question 19

the product of objects mass and velocity

Answer 19

momentum

Question 20

what represents momentum

Answer 20

p

Question 21

momentum equation

Answer 21

momentum(kg x m/s) = mass(kg) x velocity(m/s)
p = mv

Question 22

momentum has size and _____

Answer 22

direction

Question 23

true or false:
momentum is always in the same direction as velocity

Answer 23

true

Question 24

true or false:
object with less mass has greater momentum

Answer 24

false; more mass

Question 25

true or false:
if 2 objects have the same mass, the object with larger velocity has more momentum

Answer 25

true

Question 26

rate of change of velocity

Answer 26

acceleration

Question 27

change in velocity = change in ___ or _____

Answer 27

speed; direction

Question 28

true or false:
acceleration has direction

Answer 28

true

Question 29

when graphing acceleration what does the slope represent?

Answer 29

object’s acceleration

Question 30

acceleration equation

Answer 30

acceleration(m/s^2) = change in velocity(m/s)/ time(s)
a = vf -vi/ t

Question 31

acceleration toward the center of a curved or circular path

Answer 31

centripetal acceleration

Question 32

when anything is thrown or shot in the air, it is called ____

Answer 32

projectile

Question 33

true or false:
projectile follows a straight path

Answer 33

false; curved