Wednesday will be our last day for new material in Physical Science, and we will spend the next three days wrapping up our discussion of work and energy, with focus on the Work-Energy theorem. This will give the students a powerful tool to analyze kinematic systems, and indeed most advanced studies of mechanics focus not on the traditional equations of motion (which, altho valid, prove cumbersome for complex systems) but on the conservation of energy within the system.

For 10 points of extra credit, students can answer the following question:

Last week in class we wrote two formulas relating the height an object falls from and the time it takes to fall. Use a similar approach to write a formula for the work done by gravity on an object with mass *m* moved with vertical displacement *h*.

This extra credit is due tomorrow (Monday).