Unit Mechanics
Year: 1996 Question#: 5
Question: In an experiment that measures how fast a student reacts, a meter stick dropped from rest falls 0.20 meters before the student catches it the reaction time of the student is
(1 ) 0.10sec
(2 ) 0.20sec
(3 ) 0.30sec
(4 ) 0.40sec
What is this question really asking?
Explanation by: JarrettSK
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Answer 1
0.10sec
INCORRECT
The correct formula for this problem is
s=vi
t+0.5a(
t2)return to top
Answer 2
0.20sec
CORRECT
This is correct. Nice use of the formula
s=vi
t+0.5a(
t2)
return to top Answer 3
0.3 sec
INCORRECT
Try using
s=vi
t+0.5a(
t2)
return to top Answer 4
0.4 sec
INCORRECT
Try using
s=vi
t+0.5a(
t2)
return to top What's this question really asking?
How much time does it take a dropped object to fall 0.2m down? return to top
