21. A mass weighing 12 pounds stretches a spring 3 inches. What is the spring constant for this spring?
21. A mass weighing 12 pounds stretches a spring 3 inches. What is the spring constant for this spring?
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Help asap! #21 & #22
Transcribed Image Text:2.1 Modeling via Systems 165
21. A mass weighing 12 pounds stretches a spring 3 inches. What is the spring constant
for this spring?
22. A mass weighing 4 pounds stretches a spring 4 inches.
(a) Formulate an initial-value problem that corresponds to the motion of this un-
damped mass-spring system if the mass is extended 1 foot from its rest position
and released (with no initial velocity).
(b) Using the result of Exercise 20, find the solution of this initial-value problem.
Expert Solution
Step 1
According to the given data
W=12lb
x=3in
We need to find
Stiffness constant
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