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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 Power. Introduction to Power. Power is the at which energy Is transferred. Power is often confused with work. Work is the of energy transferred. Introduction to Power.

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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 Power

  2. Introduction to Power Power is the at which energy Is transferred Power is often confused with work. Work is the of energy transferred

  3. Introduction to Power Power is the rate at which work is done. Mathematically:

  4. Example What is the power of a crane that does x J of work in s?

  5. Example How much power would a crane need to lift a x kg bucket of concrete a vertical distance of m in s?

  6. Work vs. Power For an elevator to take people to the top of a building, a given amount of energy is required ( a given amount of work needs to be done). If the elevator took the people up in half the time, the amount of energy required would be the same, but the power of the elevator would have to be doubled.

  7. Homework Page 370 in the Textbook #41, 42, 43, 44, 45

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