Physics Review Question Unit: Mechanics Year: 1994 Question#: 6 Question: A rock falls freely from rest near the surface of a planet where the acceleration due to gravity is 4.0 meters per second2. What is the speed of this rock after it falls 32 meters? (1 ) 8.0 m/s (2 ) 16 m/s (3 ) 25 m/s (4 ) 32 m/s What is this question really asking? Explanation by: Maria K [ Return to question menu ] Answer 1 8.0 m/s INCORRECT given: v intial = 0m/s a = 4.0 m/s2 s = 32 m find : v final try using  return to top Answer 2 16 m/s CORRECT given: v intial = 0m/s a = 4.0 m/s2 s = 32 m find : v final you used  correctly. return to top Answer 3 25 m/s INCORRECT given: v intial = 0m/s a = 4.0 m/s2 s = 32 m find : v final try using  return to top Answer 4 32 m/s INCORRECT given: v intial = 0m/s a = 4.0 m/s2 s = 32 m find : v final try using  return to top What's this question really asking? What's the final velocity of the rock? return to top This web site is designed and maintained by Science Joy Wagon and may not be reproduced or redistributed without written permission from Science Joy Wagon. Contact with comments.