How Weed Eaters Work (at 62,000 FRAMES PER SECOND) - Smarter Every Day 236

Summary by Krater

An investigation into the physics of string trimmers using high-speed photography at up to 62,082 frames per second, examining how line length, centrifugal force, aerodynamic drag, and obstacles like fences affect the trimming process.

From the video

Answers: How does a string trimmer line work in slow motion?

• string trimmer physics
• high-speed photography
• aerodynamic drag on trimmer line
• weed eater line dynamics
• trimmer line interaction with fences

What it concludes

• As trimmer line gets longer, aerodynamic drag increases and causes the entire system to lag significantly.
• When a trimmer line hits a fence and wraps 360 degrees around it, it acts as a tension brake that rips the line.
• Trimmer line does not make a single cut instantly, but continuously whips grass until it pulverizes it into the correct length.