Concept explainers
A certain spring stretches 3 cm when a load of 15 N is suspended from it. How much will the spring stretch if 45 N is suspended from it (and the spring doesn’t reach its elastic limit)?
The amount of stretch in spring.
Answer to Problem 47A
Spring is stretched by 9 cm.
Explanation of Solution
Given :
When a load of 15 N is suspended spring is stretched by 3 cm.
Second force applied is,
Formula used :
Where, F is force, k is spring constant and x is length of spring stretched.
Calculation :
Now, substituting
Now, substituting the value of
Conclusion :
Therefore, spring is stretched by 9 cm.
Chapter 18 Solutions
Conceptual Physics: The High School Physics Program
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