Seat Ibiza Owner's Manual page 19

The control lamp  in the instrument panel lights up
senger seat belt is not fastened
over, an audible warning is heard on exceeding 25 km/h (15 mph)
acoustic signal stops when the seat belt is fastened.
The warning lamp*  is switched off if the driver seat belt is fastened while
the ignition is switched on.
Physical principles of frontal collisions
1)
Depending on the model version
Safety
1)
if the driver or pas-
1)
when the ignition is switched on. More-
1)
Fig. 6 Vehicle about to
hit a wall: the vehicle oc-
cupants are not wearing
seat belts
Operation
. This

It is easy to explain how the laws of physics work in the case of a head-on
collision: When a vehicle starts moving
known as "kinetic energy" is produced in the vehicle and its occupants.
The amount of "kinetic energy" depends on the speed of the vehicle and
the weight of the vehicle and its passengers. The higher the speed and the
greater the weight, the more energy there is to be "released" in an accident.
The most significant factor, however, is the speed of the vehicle. If the
speed doubles from 25 km/h (15 mph) to 50 km/h (30 mph), for example,
the corresponding kinetic energy is multiplied by four.
Because the vehicle occupants in our example are not restrained by seat
belts, all of the occupants' kinetic energy has to be absorbed at the point of
⇒ F ig.
impact 7.
Even at speeds of 30 km/h (19 mph) to 50 km/h (30 mph), the forces acting
on bodies in a collision can easily exceed one tonne (1000 kg). At greater
speed these forces are even higher.
Advice
Seat belts
Fig. 7 The vehicle hits
the wall: the vehicle oc-
cupants are not wearing
seat belts
⇒ F ig.
6, a certain amount of energy
Technical specifications
17
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