Physics applications

Physics & Physical Science Demos, Labs, & Projects for High School Teachers

catapult21I’ve been searching for a projectile motion activity/lab for my physical science class.  I completely forgot about this one, and I’ve done it for years.  We are going to make catapults from popsicle sticks, hot glue, rubber bands, and a spoon.

I like this lab because the hot glue allows for rapid build and repair, and there is a definite need for repair and modification in this project.  The kids typically build the frame from the popsicle sticks and then try to attach the spoon with rubber bands.  The spoon is the launcher for the catapult.  Usually, they find there is no way to connect the rubber bands, so they start adding little posts.  The next problem they encounter is the rubber bands aren’t tight enough so the object doesn’t launch very far.  They then tighten the rubber bands and the frame starts to collapse.  So they need to go…

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We get things according to what we think

“It’s all about what’s going on in your mind. There are no rules according to the Universe. You provide the feelings of having it now; it will respond – whatever it is.” — Bob Doyle

(from The Secret)