Physics Crossword

2. A force that resists motion when any 2 surfaces are contacting each other.
3. An attractive force that exist between all object with mass, and keeps us from floating away.
7. _____ Energy is often thought of as stored energy.
8. any device that makes work easier by changing a force.
9. In engineering this is what we call a first, typical preliminary model of something, especially a machine.
11. A simple machine composed of a fulcrum and an arm.
12. _____ Energy is the energy of objects in motion.
14. _____ potential energy is a type of stored energy that occurs when you do things like stretch a rubber band.
16. This class of lever has the fulcrum in the middle like a seesaw.

1. How much a machine changes the input force is its ______ advantage.
4. Ballistic devices we built in class used to launch a projectile a great distance.
5. To launch a projectile the maximum distance this is the ideal angle degree(# spelled out).
6. This class of lever has the load in the middle and fulcrum on one end
10. Similar to a catapult but it also has a sling attached to the arm to help launch it's projectiles.
13. In Physics, it's the ability to do work.
15. This class of lever has a fulcrum on one end and the load on the other end.