How does a fly swatter kill

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JTsyo

Lifer
Nov 18, 2007
12,070
1,159
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Why Do Fly Swatters Work?

If you’ve ever tried to swat a fly with your hand or with a book, you’ve probably found that the pesty insect takes off before you can strike it.

Flies have sensory hairs over their bodies, and these hairs can feel slight changes in air pressure. A moving hand pushes the air down on the fly, and the insect’s hairs pick up the change in air pressure and alert it to take off.

What makes a fly swatter work is not its shape or its strength, but the holes in it. When you swing a fly swatter, air passes through the holes, and not enough air is pressed downward on the fly to alert it.

Think even if you try to punch the fly there's enough of an air cushion to let it survive. You need to use the clap method if you want to kill them with your bare hands.
 

Jeff7

Lifer
Jan 4, 2001
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Think even if you try to punch the fly there's enough of an air cushion to let it survive. You need to use the clap method if you want to kill them with your bare hands.
Not necessarily - I've been able to kill them by smooshing them while they're resting on a flat surface.:)
But yes, clapping above them is much easier.

Once it lands, you can be more confident about moving in close if the fly starts cleaning itself - that usually means it's a bit more at ease, and in its "doesn't suspect a thing" mode.
Move in slow, hands apart, and...CLAP. Dead fly. It's super effective.


It sucks though when you've got a hyperactive fly that just ate an entire sugar cube and Just. Won't. Land. And if it finally does land, it's so jittery that just looking at it spooks it enough that it takes off on another 20 minute marathon flight.
 
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SP33Demon

Lifer
Jun 22, 2001
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Really. If you take your fist and hit a fly in mid air... the fly lives.

You take a fly swatter do the same thing.. and dead

D:

You need to take a physics class and it will all be apparent. Momentum=massXvelocity.