# physics

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a roller coaster, traveling with an initial speed of 15 meters per second, decelerates uniformly at -7.0 meters per second Squared to a full stop. Approximately how far does the roller coaster travel during its deceleration?

• physics -

The time it takes to stop is
Vo/a = 15/7 = 2.143 s
The average speed while stopping is
Vo/2 = 7.5 m/s
Multiply those two numbers to get the distance traveled while decelerating.

• physics -

16m

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