A roller coaster is moving at 25 m/sec at the bottom of a hill - Acceleration

timer Asked: Oct 7th, 2015
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Question description

A roller coaster is moving at 25 m/sec at the bottom of a hill.  Three seconds later it reaches the top of the next hill, moving at 10m/sec.  What is the acceleration?  Is it increasing or decreasing its speed?

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Boston College

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