Ch 1/2

Question 1

what are motion diagrams

Answer 1

diagrams that show an objects position at equal intervals of time

Question 2

what is position

Answer 2

locates an object with respect to chosen coordinate system

Question 3

what is time

Answer 3

elapsed time between two specific instants

Tf- Ti

Question 4

displacement

Answer 4

delta x = Xf - Xi
blue arrow

Question 5

speed

Answer 5

total distance / delta
always positive

Question 6

velocity

Answer 6

delta x/ delta t
green arrow
left/down = negative
right/up = positive

Question 7

scalar vs vector

Answer 7

scalar = magnitude alone
vector = magnitude and direction

Question 8

magnitude

Answer 8

is always positive

Question 9

position time graph slope

Answer 9

instant velocity = rise / run

Question 10

steeper the x-t graph ?

Answer 10

=faster

Question 11

if x-t graph is a straight line ?

Answer 11

velocity is constant

Question 12

area under a v-t graph?

Answer 12

displacement

Question 13

slope of v-t graph ?

Answer 13

instant acceleration

Question 14

what is uniform motion?

Answer 14

constant motion
on motion diagrams dots are equally spaced
equal displacement in any successive equal time intervals

Question 15

acceleration

Answer 15

delta v/ delta t

Question 16

if a and v are travelling in the same direction ?

Answer 16

object is speeding up

Question 17

if a and v are travelling in different directions ?

Answer 17

object is slowing down

Question 18

free fall

Answer 18

any motion when gravity is the only acting force a = 9.8

Question 19

kmh to ms
km to m

Answer 19

divide by 3.6
x1000