In article >,
Alan Baker > wrote:

> The minimum that the speed of the stopped vehicle will be is in the case
> of a completely inelastic collision (where both vehicles move together
> after the collide) and in the case of equal mass, it will be exactly
> half the speed of the rear vehicle..

:-)

Tonight's homework:

Solve the motion equations for a Cooper Mini stopped 30 feet behind a
stopped H2 and rear ended by a Freightliner semi truck hauling a
vehicle transport trailer fully loaded with Ford Expeditions and
traveling at 18 mph at time of impact.

Bonus: does the H2 driver drop his/her cell phone?

show all math.

..max

--
<blink>