Concept explainers
You are looking through your grandparents' window and notice a hummingbird feeder hanging by a rope. You can’t see the top of the rope, but you notice that in a gentle breeze the feeder moves back and forth with a period of 4.0 seconds. You make a calculation and announce to your grandparents that the rope is 4 m long. Your grandparents go outside and measure the rope. Should they be impressed with you?
To verify: The length of the rope measured by grandparents and calculated by their grandchild is the same.
Answer to Problem 59A
Yes, the length of the rope is the same.
Explanation of Solution
Given: The period of the hummingbird feeder hanging by a rope is
Formula used: The time duration of oscillation is calculated as
Calculation: The length of the rope is calculated as
Conclusion: Thus, the length of the rope measured by the grandparents is equal to the length of a rope calculated by the grandchild.
Chapter 25 Solutions
Conceptual Physics: The High School Physics Program
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