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6.1 Work Done by a constant Force
6.3 Kinetic Energy, and the Work-Energy Principle
6-4 Potential Energy
6-5 Conservative and Non-conservative Forces
Objectives:
1. Students will explain how work is done on an object.
2. Students will describe how work is affected by the angle of the force.
3. Students will explain the relationship of work and the change in energy.
4. Students will compare and contrast conservative and non-conservative forces.
Homework: 1-8 p. 162 / 15-31 pp. 162-163
Formula Search –Find all formulas state the units and purpose for making
calculations.
Vocabulary to Know:
Work
Translational Kinetic Energy
Force
Potential Energy
Constant Force
Gravitational Potential Energy
Joule
Elastic Potential Energy
Net Work
Spring Equation
Kinetic Energy
Hooke’s Law
Work-Energy Principle
Conservative Forces
Mechanical Energy
Non-Conservative Forces
Conservation of Mechanical Energy
6.1 Work Done by a Constant Force:
1. Compare and contrast the everyday meaning of work to its meaning in physics.
2. List the types of units for work.
3. How can a force be exerted on an object but no work done?
4. Describe the forces acting on an object that create the total net force.
5. How can negative work be done on an object?
6.3 Kinetic Energy, and the Work-Energy Principle:
1. Define the term energy.
2. What is kinetic energy?
3. How does the change in kinetic energy relate to work?
4. What is the work-energy principle?
5.Relate Newton’s Laws to the work-energy principle.
6. Describe the relationships that exist in translational kinetic energy.
7. Why are work and kinetic energy a scalar quantity?
6.4 Potential Energy:
1. Define potential energy.
2. Explain the different types of potential energy and list the formulas.
3. How is the change in potential energy related to work?
4.How does potential energy change for a roller coaster?
5. Describe Hooke’s Law.
6. How is work related to elastic potential energy?
7. Explain the force distance diagram on page 147.
6.5 Conservative and Non-Conservative Forces:
1. Compare and contrast conservative and non-conservative forces.
2. How does the work energy principle relate to potential energy?
3. What is the general formula for the work-energy principle?