p8.1

Question 1

measuring speed 100m sprint

Answer 1

electronic timing
measuring tape
pressure sensor and laser beam at the end of

Question 2

measuring speed car on road

Answer 2

speed camera
trundle wheel
time between two photos

Question 3

measuring speed cyclist

Answer 3

wheel sensor
wheel diameter
magnetic sensors detecting each rotation

Question 4

measuring speed any

Answer 4

satellite navigation
comparing distances to three distances
electronic timer

Question 5

walking speed

Answer 5

1m/s
2.2 mph

Question 6

running speed

Answer 6

5m/s
11mph

Question 7

cycling speed

Answer 7

7m/s
15mph

Question 8

olympic cycling speed

Answer 8

20m/s
45 mph

Question 9

strong wind speed

Answer 9

13m/s
30mph

Question 10

car speed

Answer 10

22m/s
50mph

Question 11

train speed

Answer 11

56m/s
125 mph

Question 12

sound speed

Answer 12

330 m/s
738 mph

Question 13

average reaction time

Answer 13

0.2 seconds

Question 14

thinking distance

Answer 14

time between seeing something and putting foot on breaks

Question 15

factors affecting thinking distance

Answer 15

drinking alcohol
using drugs/ medicine
being tired
distractions
eating or drinking
radio or satellite navigation systems

Question 16

braking distance

Answer 16

distance while force is applied on brake pedals

Question 17

stopping distance

Answer 17

thinking distance + breaking distance

Question 18

what would happen without a belt

Answer 18

continue moving at original speed and collide with dashboard

Question 19

what can seatbelt do during deceleration

Answer 19

if very large seatbelt can cause compression issues
injure internal organs

Question 20

max speed of car on motor way

Answer 20

70mph