
One of the catapults.
Pepper Moto/Courier Photo
Hacky sacks flew in Logan Physics teacher Julie Chuang's 2nd period class Thursday as students launched them into the air using home-made model catapults made for a class assignment
The class was assigned to make catapults as a way to display and learn concepts related to a "projectiles," bodies impelling or driving forward as a force through the air.

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