18 Seat belt
D50
1
Safety operation instruction
Caution
●When the driver does not fasten the seat
belt, the warning light is on.
●When the vehicle speed is ≥25km/h, the
vehicle's continuous driving time is ≥60
seconds or the vehicle's continuous
driving distance is ≥500m, and the front
passengers are still not wearing the seat
belt, the front passenger seat belt warning
light flashing, and the buzzer sound alarm
for 120 seconds. After that, the buzzer will
end the alarm light will continue on.
Physical principle of frontal crash
During driving, both the car and passengers
have energy (kinetic energy), the intensity
depends on the speed of the car and the weight
of the passenger in the car; the greater the speed
and mass, the greater the energy released during
the crash. And the speed of the car plays a
decisive role. If the speed increases from
25km/h to 50km/h, the release of kinetic energy
will increase to four times.
The people who are not wearing seat belts are
not "combined" with the vehicle. Therefore, in
the event of a frontal crash, the people who are
not wearing the seat belt will move forward at
same speed before the crash. The crash physics
described in this example applies not only to
frontal collisions but also to all other types of
vehicle crash.
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