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
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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
