Physics Review QuestionUnit
MechanicsYear:
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
) 0.40secWhat is this question really asking?
Explanation by: JarrettSK [ Return to question menu
]Answer 1
0.10sec INCORRECT The correct formula for this problem is s=v _{i}t+0.5a(t^{2})return to top
Answer 2
0.20sec CORRECT This is correct. Nice use of the formula s=v _{i}t+0.5a(t^{2})
return to top
Answer 3
0.3 sec INCORRECT Try using s=v _{i}t+0.5a(t^{2})
return to top
Answer 4
0.4 sec INCORRECT Try using s=v _{i}t+0.5a(t^{2})
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 |

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