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Thread: Would a dragonfly smash a car window?

  1. #1 Would a dragonfly smash a car window? 
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    Hey

    Wasn't sure where to post this so I thought physics but there is an ongoing debate between my friends and I about whether if a dragonfly hit your car window could it potentially go through it?

    Eg. Dragonfly can move at up to 60mph, so if you hit it at say 60mph does that mean it hits at 120mph and this surely that could at least crack the glass?

    Any advice appreciated...


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  3. #2  
    Forum Radioactive Isotope MagiMaster's Avatar
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    In orbit, paint flecks can go through astronauts, so it's really a question of velocity. Then again, there are no air currents in space to deflect the objects, so exactly how fast the dragonfly hits the window is not a straightforward question either.


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  4. #3  
    Time Lord
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    Our terroristic dragonfly had better dive straight down to cause maximum damage. That's assuming car is also doing 60mph and windshield is 45°.

    But no at those speeds pebbles do hit windshields often enough and only chip a little crack.
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  5. #4  
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    Surely you jest. Maybe you meant dragon lizard? Or flying dragoon?

    Dragonflies hit windshields all the time. The critters are particularly thick in Florida during their annual hatch. All they do is go Splat!

    Car windshields are not like ordinary window glass. They are made of tempered glass and are a 3-layered sandwich for additional strength and safety. It takes a powerful blow to penetrate.


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  6. #5  
    Forum Masters Degree SuperNatendo's Avatar
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    I agree, the dragonfly simply does not have the mass required to penetrate the thick glass of a car windshield, at least not at speeds under 300 mph.
    "It's no wonder that truth is stranger than fiction. Fiction has to make sense." - Mark Twain
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  7. #6  
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    Poor dragonflies.......
    Of all the wonders in the universe, none is likely more fascinating and complicated than human nature.

    "Two things are infinite: the universe and human stupidity; and I'm not sure about the universe."

    "Great spirits have always found violent opposition from mediocrities. The latter cannot understand it when a man does not thoughtlessly submit to hereditary prejudices but honestly and courageously uses his intelligence"

    -Einstein

    http://boinc.berkeley.edu/download.php

    Use your computing strength for science!
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