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Work Power and Machines

Learn the fundamental concepts of work, power, and machines for enhanced understanding of energy transfer and efficiency. Explore the relationship between force, distance, and energy in various applications.

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Work Power and Machines

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  1. Work Power and Machines Notes

  2. Work • The transfer of energy to an object when a force makes it go in the direction of the force.

  3. Work is Done When… • An object gets kinetic energy from an applied force • An object moves in the same direction as the force • Only when force is applied

  4. Work is not done when… • An object does not move despite force applied • An object moves but in a different direction than the force

  5. The Amount of Work Done… • W = F * D (work = force times distance) • Unit of measure = Joules (J) • Is the same if: • driving up a road (less force, more distance) and • straight up a cliff (more force, less distance)

  6. Power = the rate of work • P = W / T (power equals work divided by time) • Unit of measure is Watts…(Joules per second) • If work is done faster then more power is used… • sanding wood by hand vs. using a power tool

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