Question

BIO Slow-Motion Dragonfly A frame-by-frame analysis of a slow-motion video shows that a hovering dragonfly takes 7 frames to complete one wing beat. If the video is shot at 240 frames per second, (a) what is the period of the wing beat, and (b) how many wing beats does the dragonfly perform per second?

Name: Problem 5, Chapter 13: Physics
Uploaded: 2020-03-14T21:01:08-08:00
Duration: 1 min 5 s
Channel: Averell Hause
Description: BIO Slow-Motion Dragonfly A frame-by-frame analysis of a slow-motion video shows that a hovering dragonfly takes 7 frames to complete one wing beat. If the video is shot at 240 frames per second, (a) what is the period of the wing beat, and (b) how many wing beats does the dragonfly perform per second?

   BIO Slow-Motion Dragonfly A frame-by-frame analysis of a slow-motion video shows that a hovering dragonfly takes 7 frames to
complete one wing beat. If the video is shot at 240 frames per second, (a) what is the period of the wing beat, and (b) how many
wing beats does the dragonfly perform per second?

Physics

James S. Walker 5th Edition

Chapter 13, Problem 5

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Solved by Expert Averell Hause

03/14/2020

Step 1

The period (T) is the time it takes for one complete cycle of motion. In this case, it is the time it takes for the dragonfly to complete one wing beat. We know that it takes 7 frames for the dragonfly to complete one wing beat and the video is shot at 240 frames Show more…

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BIO Slow-Motion Dragonfly A frame-by-frame analysis of a slow-motion video shows that a hovering dragonfly takes 7 frames to complete one wing beat. If the video is shot at 240 frames per second, (a) what is the period of the wing beat, and (b) how many wing beats does the dragonfly perform per second?

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Key Concepts

Frame Rate

This is the number of individual frames that a video camera captures per second. It is a critical concept in the analysis of time-dependent phenomena because it allows us to convert the count of frames between events into the actual time interval between them.

Period

In the context of periodic motion, the period is the duration of one complete cycle of that motion. It can be calculated by dividing the number of frames taken to complete one cycle by the frame rate, translating discrete frames into a continuous time measure.

Frequency

Frequency refers to the number of cycles that occur per unit of time, typically per second. It is the reciprocal of the period, and it quantifies how often a repeating event, such as a wing beat, takes place within one second, providing a measure of the rate of oscillation.

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