# Car safety recap GCSE Physics

Just in case anyone is strugglin with this topic heres a word document with information and questions about it. :)

enjoy

- Created by: Ragnaros the Firelord
- Created on: 10-01-12 18:55

First 185 words of the document:

SPEED AND SAFETY

1 mile = 1609 metres 1 minute = 60 seconds 1 hour = 60 minutes

To change miles per hour to metres per second, we divide the number of metres in a mile by

the number of seconds in an hour:

1 m.p.h. (1 m/h) = 1609 m/s

60x60

= 0 .447 m/sec

We will approximate this to 0. 45 m/ s. So 0.45m/s is equal to 1 m/h

So complete the table:

Speed (m/h) Speed (m/s)

10 4.5

20

30

40

50

60

70

The Highway Code calculates the stopping distances for cars travelling at different

speeds. It combines the distance that it takes for the driver to realise they need to brake

(the THINKING DISTANCE) and the distance that it actually takes to stop once the brakes

have been pressed (the BRAKING DISTANCE).

The table below shows these distances, fill in the gaps:

Speed Speed (m/s) Thinking Braking Total Total distance

(m/h) distance (m) distance distance to to stop in wet

(m) stop (m) weather (m)

20 9.0 6 6 12

30 9 14

40 18.0 24

50 38

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