Why Safety Belts Work
When you ride in or on anything, you go as fast as it goes.

Take the simplest vehicle. Suppose it is just a seat on wheels.

Put someone on it.

Get it up to speed. Then stop the vehicle.
The rider does not stop.

The person keeps going until stopped by something. In a real vehicle, it could be the windshield...

or the instrument panel...

or the safety belts! With safety belts, you slow down as the vehicle does. You get more time to stop. You stop over more distance, and your strongest bones take the forces. That is why safety belts make such good sense.
See also:
Seat Adjustment
WARNING
You can lose control of the vehicle if you try to adjust a manual driver seat
while the vehicle is moving. The sudden movement could startle and confuse you,
or make you push a pedal wh ...
Following Distance
Stay at least twice as far behind the vehicle ahead as you would
when driving the vehicle without a trailer. This can help to avoid situations that
require heavy braking and sudden turns. ...
Making Turns
Notice: Making very sharp turns while trailering
could cause the trailer to come in contact with the
vehicle. The vehicle could be damaged. Avoid
making very sharp turns while trailering.
When ...
