~.
Why Safety
Belts
Work
When
you
ride
in
or
on
anything,
you
go
as
fast as
it
goes.
For
example,
if
the bike is going
IO
mph
(16
km/h),
so
is the child.
When the bike hits the block,
it
stops.
But
the child keeps going!
Take the simplest
"car."
Suppose
it's
just
a
seat
on
wheels.
