Lecture 3

Question 1

____ is the change in an objects position from an initial location to a final location

Answer 1

displacement

Question 2

displacement

Answer 2

-usually expressed in m
-displacement is a vector quantity meaning it requires magnitude (5m ) and direction to be fully described
-to calculate displacement, draw a straight line form the initial position to the final position

Question 3

what does a displacement value of zero mean?

Answer 3

initial and final location are equal

Question 4

displacement value that is negative

Answer 4

left -

Question 5

displacement formula

Answer 5

d =final positon (pf)-initial positon (pi )

Question 6

velocity rate of change in an object’s ___ over a particular ______

Answer 6

displacement
time interval

Question 7

velocity

Answer 7

-usually expressed in m/s
-velocity is a vector quantity meaning it requires magnitude and direction to be fully described

Question 8

velocity value of zero

Answer 8

not moving

Question 9

postive velocity value

Answer 9

moving up or forwards

Question 10

negative velocity value

Answer 10

moving down or left

Question 11

distance vs. displacement

Answer 11

distance is a scalar and reflects the total length traveled

displacement is a vector and is the difference imposition from the final position and the initial position

Question 12

an object moves in a straight line displacement and distance are

Answer 12

equal

Question 13

an object does not move in a straight line:

Answer 13

distance and displacement will not be equal

Question 14

displacement is always

Answer 14

less than or equal to distance

Question 15

speed vs. velocity

Answer 15

speed is scalar quantity calculated as the distance traveled over time or rate of distance travelled over time
speed has no reference to the direction

speed = distance /time

Question 16

average velocity

Answer 16

reflects he average change in displacement over a time interval

Question 17

instantaneous velocity reflects the rate of change of displacement at a

Answer 17

particular instant in time

Question 18

instantaneous velocity can be calculated using

Answer 18

visual inspection or central difference method

Question 19

what happens to displacement when we increase velocity and keep time constant?

Answer 19

displacement increases

Question 20

what happens to displacement when we increase time and keep velocity constant ?

Answer 20

displacement increases

Question 21

can we calculate displacement if velocity and time are known?

Answer 21

yes we multiply velocity by time

Question 22

displacement is the _____

Answer 22

of a velocity vs time graph

Question 23

displacement and velocity require ______ and _____- to be fully described

Answer 23

magnitude
direction

Question 24

displacement is always

Answer 24

less than or equal to distance

Question 25

velocity is the ______ of a displacement graph

Answer 25

slope

Question 26

zero velocity indicates a ______

Answer 26

change in direction
(change in the sign of velocity