- #1
MightyHound
- 1
- 0
Here is the question:
Gently displace the mass and release it so that it performs vertical oscillations. Make measurements to determine the period T of the oscillations.
+++++
So here is what I did:
Time for 20 oscillations = t1 (2 d.p)
Time for another 20 oscillations = t2 (2 d.p)
Average time for 20 oscillations = (t1 + t2)/2 (2 d.p)
Time for one oscillation, T = { (t1 + t2)/2 } / 20 ---> this is your answer correct to 1 decimal place.
Right. Next question:
Estimate the number of oscillations that would need to be timed in order to make the percentage uncertainty in T equal to 1%. Show your working.
++++++++++++++++
Let error in one reading be x
So we use the formula:
2x/T = 0.01
where T = { (t1 + t2)/2 } / N (N is the number of oscillations).
We use the above formula to find out N.
Here are my concerns:
Is the working above correct for the two questions?
What on Earth is the error in timers? (for protractors it is 1deg; for rulers it is 1mm).
Thanks friends.
I am getting that heartpounding, gutwrenching, vomit inducing exam jitters right about now. Exam is only a few days away.
I am not new to the forums here - I have been an avid view for some time now.
Thanks for all your help guys!
Gently displace the mass and release it so that it performs vertical oscillations. Make measurements to determine the period T of the oscillations.
+++++
So here is what I did:
Time for 20 oscillations = t1 (2 d.p)
Time for another 20 oscillations = t2 (2 d.p)
Average time for 20 oscillations = (t1 + t2)/2 (2 d.p)
Time for one oscillation, T = { (t1 + t2)/2 } / 20 ---> this is your answer correct to 1 decimal place.
Right. Next question:
Estimate the number of oscillations that would need to be timed in order to make the percentage uncertainty in T equal to 1%. Show your working.
++++++++++++++++
Let error in one reading be x
So we use the formula:
2x/T = 0.01
where T = { (t1 + t2)/2 } / N (N is the number of oscillations).
We use the above formula to find out N.
Here are my concerns:
Is the working above correct for the two questions?
What on Earth is the error in timers? (for protractors it is 1deg; for rulers it is 1mm).
Thanks friends.
I am getting that heartpounding, gutwrenching, vomit inducing exam jitters right about now. Exam is only a few days away.
I am not new to the forums here - I have been an avid view for some time now.
Thanks for all your help guys!