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Here is the way I understand "jerk".
Say I am on a commuter train, standing up, as the train comes into the
station. As it slows to a stop, it has an approximately constant
acceleration opposite the direction of motion. Once it comes to a stop,
of course it doesn't reverse direction but it stays stopped. In other
words, when the velocity reaches zero, the acceleration also
decreases to zero. That's the "jerk", and I think it's the same thing
that happens to Leigh's car--the only difference being the source of
. . .
Now why do I FEEL the "jerk"? . . .
--
Martha Takats