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Behind the ballistics of the 'explosive' squirting cucumber

phys.org

1–10 of 14 posts

Re: Behind the ballistics of the 'explosive' squirting cucumber

#5
post #4

> speeds up to 29 miles per hour and reach shooting distances up to 12 meters. My brain hurts. But I learned a new word: mucilaginous.

This reminded me of the South American "dynamite tree" (Hura crepitans, https://en.wikipedia.org/wiki/Hura_crepitans ), which wikipedia says launches seeds from its exploding fruits at 160 mph, up to 100 ft away! A pretty menacing tree actually, its trunk covered in huge thorns and it has a poisonous sap.

Re: Behind the ballistics of the 'explosive' squirting cucumber

#8
post #5
post #4

> speeds up to 29 miles per hour and reach shooting distances up to 12 meters. My brain hurts. But I learned a new word: mucilaginous.

This reminded me of the South American "dynamite tree" (Hura crepitans, https://en.wikipedia.org/wiki/Hura_crepitans ), which wikipedia says launches seeds from its exploding fruits at 160 mph, up to 100 ft away! A pretty menacing tree actually, its trunk covered in huge thorns and it has a poisonous sap.

Wow. We really have it good considering most trees don't fire projectiles at us.

Re: Behind the ballistics of the 'explosive' squirting cucumber

#10

Wild how evolution landed on 53° as the ideal launch angle. Nature’s own ballistics optimization.

> The experiments also revealed that the fruit stem straightens up during ripening, creating an average 53° angle that is close to the theoretical perfect angle of 50° that would maximize shooting distance.

I recall from school that distance is maximized for a ballistic path when the angle is 45°. See e.g. https://www.scientificamerican.com/article/football-projecti...

Did someone get confused while writing this article or is there some reason why the optimal angle would be different in this situation?

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