• Learning target: I can define work in terms of force and
displacement
• Vocabulary:
mechanical energy
• kinetic energy potential energy
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Go over homework 3 and 4 sheet, practice D and E problems.
Notes: conservation of energy and power
Lab?: Power and energy #1
Homework: Rocket math
End of class: Many mountain roads are built so that they zigzag up
the mountain rather than go straight up toward the peak. Discuss
the advantages of this design from the viewpoint of energy
conservation and power.
Agenda Feb 8, 2016
• If mechanical energy is conserved, than the same amount
of energy is needed to reach the top whether you are
zigzagging or going straight up. Since the same amount
of work is being done the path with a longer distance
takes more time and therefore takes less power!
Answer to end of class