Posted by ashaly on Wednesday, September 26, 2012 at 7:33pm.
it takes 5 s to stop the car __ 55 / 11
the average speed (Va) is __ (55 + 0) / 2
the stopping distance is __ Va * 5
twice as fast means that the stopping time is doubled, along with the average speed
__ this means that the car travels 4 times as far
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