Our second day started with our continuation of our exploration of periodic motion and pendulums. We then explored circular motion. We distinguished between rotation and revolution. Spencer presented a lesson on the terms centripetal (center seeking) and centrifugal (center fleeing). Spencer also elaborated on the concept of momentum. We then shot marshmallows out of pvc pipes of various lengths to illustrate how the length of the force applied increases the distance the marshmallows traveled. We looked at equations in both physics and math and discussed the importance of math in physics. The rest of the day was spent working with simple machines. Participants used levers, pulleys and incline planes. We discussed how simple machines made work easier by spreading a force over an extended distance. We used spring scales to measure force and explored equations that calculate mechanical advantage. Today's field trip took us to the fifteenth floor at Wilson Hall and to the Linac Accelerator.