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Physics 17 Online
OpenStudy (anonymous):

A space vehicle deploys its re-entry parachute when it's traveling at a vertical velocity of -150 meters/second (negative because the parachute is going down.) It comes to rest at 0 meters/second after 30 seconds. What's the average acceleration of the shuttle during this time span? a) -0.2 meters/second^2 b) -5 meters/second^2 c) 0.2 meters/second^2 d) 5 meters/second^2

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