| | the final round of egg dropsso we had our third and final round of egg drops today. not surprisingly the boys all copied the design that worked last time.
kyum jae's is the same as his old one without the side protection (he chose to use less paper for potentially greater rewards)
hongmin made a short stubby cylinder.
dong hyun was coaxed out of embarrassment to copy everyone else.
young gwang made yet another cylinder but attached a pathetic parachute. after i made fun of its lack of utility, he fixed it.
chanmin and his "hammer."
in woo and his cylinder with random stuff on the sides.
dong hyun went first and got partial credit because his egg only had a crack.
in woo's design was not balanced.
look at all that egg goo. FAIL 3X
hongmin's stubby cylinder fell on its side.
you can see the crushed egg remains. FAIL 2X
the look on chanmin's face here was about the same when the egg hit the ground. that "hammer" of his fell directly on its side. the egg goo poured out immediately. FAIL 2X
you can see that young gwang's parachute is improved here. it fell very softly and this time the egg was actually protected for impact.
the first student to pass through skill. chute FTW!
kyum jae's design fell straight (as opposed to the others). but then it took a really hard bounce and flipped over.
the second bounce is probably what broke his egg. close but still FAIL
all in all, it seems like my students have a better understanding of impact physics now. i finally shared with them what my design was in highschool. the cylinder is a good design as it can absorb a lot of impact but it also has to fall almost perfectly to work. instead i used the cone which helps disperse energy well. i covered my egg all around with cones to make a "star." it didn't matter how it fell. there were enough points all around the egg to absorb the impact from any direction. in my physics class i wasn't allowed to use a parachute of any sort. |
| | Posted 5/13/2008 1:25 AM - 1 comments
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