=====Torque=====

====Concepts Learned====

Basic idea of torque - leverage. Pivot systems. 
Definition of torque in terms of = Force x distance
...Frictional torque?

Experiments/demos

Wrenches? How easy is it to undo a bolt with a short wrench vs. a long wrench. 

Can calculate how much torque one wrench has vs. another?

Lifting levers - build them.

Wheels! [?]

Draw diagrams of force and torque...?

====Building/Design Challenges====

Each group given a weight, have to do calculations then build the thing?
Very simple design challenge.

OR build a trigger for the spring guns? Have that be the next thing? Figure out how much we need to resist force? <-- does this experiment make sense.