Lecture 7 - Linear Kinematics

Question 1

what is needed for position

Answer 1

a reference frame

Question 2

what is position and what is the symbol for it

Answer 2

position is a vector and the symbol is s

Question 3

what does position tell you

Answer 3

where you are to the origin of your point of interest

Question 4

how are vectors written

Answer 4

in bold or sometimes they have an arrow over the top

Question 5

distance and displacement are both

Answer 5

descriptions of change in position

Question 6

distance is a …

Answer 6

scalar

Question 7

distance tells us

Answer 7

the length of path (like if you stretched out the path and measured the full distance travelled)

Question 8

what is the symbol for distance

Answer 8

d (not in bold as it is a scalar)

Question 9

displacement is a …

Answer 9

vector

Question 10

displacement tells us

Answer 10

difference between initial and finial position

Question 11

what is the symbol for displacement

Answer 11

d (in bold as it is a vector)

Question 12

what is the equation of displacement

Answer 12

displacement (bold d) = change in position (s) = sf - si

Question 13

what is the slope on rate of change graph equal to

Answer 13

rise / run

Question 14

speed is a …

Answer 14

scalar

Question 15

speed tells us the

Answer 15

rate of change in distance

Question 16

equation of speed

Answer 16

v = d / change in time

speed = distance / change in time

Question 17

velocity is a …

Answer 17

vector

Question 18

velocity tells us

Answer 18

the rate of change in position

Question 19

what is the equation of velocity

Answer 19

bold v = bold d / change in time

velocity = displacement / change in time

Question 20

what is the expanded version of the velocity equation

Answer 20

(final position - initial position) / (final time - initial time)

Question 21

a positive slope on a distance graph would mean what for velocity

Answer 21

positive velocity

Question 22

a constant slope on distance graph would mean what for velocity

Answer 22

constant velocity

Question 23

an increasing slope on distance graph means what for velocity

Answer 23

increasing velocity

Question 24

speeding up and slowing down doesnt ….. so that means it is a

Answer 24

doesn’t have any reference to direction therefore is a scalar

Question 25

speeding up and slowing down tells us

Answer 25

rate of change of speed

Question 26

what is the equation of speeding up / slowing down

Answer 26

a = change in speed / change in time

v is not bold because it is speed not velocity

Question 27

acceleration is a …

Answer 27

vector

Question 28

acceleration tell us

Answer 28

rate of change of velocity

Question 29

what is the equation of acceleration

Answer 29

a in bold = change of v in bold / change in time

acceleration = change in velocity / change in time

Question 30

a positive velocity slope on graph means what for acceleration

Answer 30

positive acceleration

Question 31

a constant velocity slope means what for acceleration

Answer 31

constant acceleration

Question 32

an increasing velocity slope means what for acceleration

Answer 32

increasing acceleration

Question 33

is someone is slowing down in the positive direction what will their direction of motion be, their change in motion and acceleration

Answer 33

positive direction of motion

negative change in motion

negative acceleration

Question 34

direction is indicated in

Answer 34

vectors

Question 35

direction is not indicated in

Answer 35

scalars

Question 36

speed, velocity and acceleration involve

Answer 36

rate of change