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PHYSICS 2204 UNIT 3: WORK AND ENERGY

PHYSICS 2204 UNIT 3: WORK AND ENERGY. Section 3.1 – Work and Power Introduction to Energy and Work. Introduction to Energy. In the broadest possible terms, physics is the study of the relationship between... m atter and energy. Introduction to Energy. Energy has no body or substance.

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PHYSICS 2204 UNIT 3: WORK AND ENERGY

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  1. PHYSICS 2204UNIT 3: WORK AND ENERGY Section 3.1 – Work and Power Introduction to Energy and Work

  2. Introduction to Energy In the broadest possible terms, physics is the study of the relationship between... • matter • and energy.

  3. Introduction to Energy • Energy has no body or substance. • Rather, it is the fuel that makes matter go. • Without energy there would be... • no motion • no heat • no light

  4. Introduction to Energy In physics, energy is defined as the ability to do work. In order for matter to become more energetic, work needs to be done on it.

  5. Two Types of Energy Kinetic Energy Potential Energy

  6. Introduction to Work Work is the process of transferring energy from one of its many forms to another.

  7. Introduction to Work Work is done when a , causing the object to move in the direction of the force. Mathematically:

  8. Introduction to Work Work depends on force AND displacement. Therefore, work is done on a object when an applied force displaces an object. Force (on the object) and displacement (of the object) have to have the same direction or no work is done!

  9. Introduction to Work No work done Work done

  10. Example Calculate the work done by applying a force of 830 N [forward] on a 3000 kg car to displace it 25 m forward.

  11. Homework Page 369in the Textbook #21, 22, 23, 24, 25

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