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A student measures the spring constant k of a spring by
Chapter 3, Problem 16E(choose chapter or problem)
A student measures the spring constant k of a spring by loading it and measuring the extension. (According to Hooke’s law, ifl is the load and e is the extension, then \(k=l/e\).) Assume five independent measurements are made, and the measured values of k (in N/m) are 36.4, 35.4, 38.6, 36.6, and 38.0.
a. Estimate the spring constant, and find the uncertainty in the estimate.
b. Find an approximate value for the uncertainty in the average of 10 measurements.
c. Approximately how many measurements must be made to reduce the uncertainty to 0.3 N/m?
d. A second spring, similar to the first, is measured once. The measured value for k is 39.3. Approximately how much is the uncertainty in this measurement?
Equation Transcription:
Text Transcription:
k=l/e
N/m
0.3 N/m
Questions & Answers
QUESTION:
A student measures the spring constant k of a spring by loading it and measuring the extension. (According to Hooke’s law, ifl is the load and e is the extension, then \(k=l/e\).) Assume five independent measurements are made, and the measured values of k (in N/m) are 36.4, 35.4, 38.6, 36.6, and 38.0.
a. Estimate the spring constant, and find the uncertainty in the estimate.
b. Find an approximate value for the uncertainty in the average of 10 measurements.
c. Approximately how many measurements must be made to reduce the uncertainty to 0.3 N/m?
d. A second spring, similar to the first, is measured once. The measured value for k is 39.3. Approximately how much is the uncertainty in this measurement?
Equation Transcription:
Text Transcription:
k=l/e
N/m
0.3 N/m
ANSWER:
Step 1 of 5:
Here the experiment under consideration is measuring spring constant k of a spring.
The five values of k obtained are 36.4 N/m,35.4 N/m,38.6 N/m,36.6 N/m,38 N/m.
Using these,we have to estimate the required values.