Goal: To demonstrate that work is a transfer of energy and that work can be done with reduced force using simple machines.
Objectives:
Students will be able to:
- define work done in terms of the force applied and the distance moved.
- define the amount of power produced in terms of the work and the time.
- identify and define types of energy including: chemical, thermal, mechanical, nuclear, electrical and radiant.
- define work in terms of energy.
- distinguish among mechanical energy, gravitational and elastic potential energy, and kinetic energy.
- give examples of situations in which (a) the gravitational potential energy changes and (b) it does not even though something is moved.
- describe how the kinetic energy of an object depends upon the speed of the object.
- state the law of conservation of energy.
- define and describe the function of a lever, pulley, inclined plane and be able to determine the mechanical advantage and efficiency of each.
- explain why no machine can have an efficiency of 100%
- Calculate work, power, kinetic energy, potential energy, actual and ideal mechanical advantage.
- Use the conservation of energy concepts to calculate the transformation of energy in kinematic problems.
Labs: Inclined Plane Lab, Pulley Lab, Lever Lab, Coefficient of Restitution,Hooke's Law to Elastic PE, Torsional PE to KE, & Gravitational PE to KE.
Lecture Notes are in .pdf format below.
Worksheets: See below list.
Conceptual Development Worksheets ("Conceptual Development" will be in the title).
Reading Assignment: Chapter 7
Extra Credit: None at this time, but if you have any ideas, write up a proposal and I'll review it for consideration
Class Updates/Test/Quiz Schedule: Refer to your SOE for the dates.