describing motion

Question 1

Distance

Answer 1

how far object moves
does not involve direction
scalar quantity

Question 2

Displacement

Answer 2

includes distance and direction
in straight line
starting to finishing point
vector quantity

Question 3

Speed

Answer 3

just not involve direction
scalar quantity
measure of how fast

Question 4

velocity

Answer 4

Involves direction
vector quantity
measure of how fast

Question 5

speed distance time equation

Answer 5

distance (m)= speed x time

Question 6

walking speed

Answer 6

1.5m/s

Question 7

wind

Answer 7

5-7m/s

Question 8

sound

Answer 8

330m/s

Question 9

running

Answer 9

3m/s

Question 10

cycling

Answer 10

6m/s

Question 11

bus

Answer 11

14kmls/h

Question 12

train

Answer 12

125mls/h

Question 13

plane `

Answer 13

900km/h

Question 14

speed

Answer 14

speed = distance /time

Question 15

acceleration

Answer 15

Rate of change of velocity amount of velocity change per unit time

Question 16

acceleration equation

Answer 16

acceleration (m/s^2) = change in velocity (m/s) / time (s)

Question 17

velocity equation

Answer 17

change in vel = final vel - initial vel

Question 18

uniform acceleration

Answer 18

acceleration due to gravity

roughly free fall at 9.8m/s

Question 19

uniform equation

Answer 19

v^2-u^2=2as

Question 20

distance time graph

Answer 20

if object moves in straight
distanced travelled plotted on distance time graphs

gradient equals speed of object= velocity

flat sections equals stationary
straight uphill equals study speed

Question 21

distance time graph acceleration

Answer 21

If speed of object changes it will accelerate or decelerate
shown as curved lines on distant time graph
stiffening curve means object is speeding up
leveling off curve means object is slowing down

Question 22

velocity time graphs

Answer 22

represents journey
how velocity changes

gradient = acceleration

flat section = steady speed

steep line = greater acceleration/ deceleration

straight line = constant acceleration/ deceleration

curved = changing acceleration/deceleration

Question 23

calculating displacement

Answer 23

distance travelled in time interval

area under a velocity time graph