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Work

Work. What is work? In science, the word work has a different meaning than you may be familiar with. The scientific definition of work is: using a force to move an object a distance (when both the force and the motion of the object are in the same direction.)

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Work

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  1. Work

  2. What is work? In science, the word work has a different meaning than you may be familiar with. The scientific definition of work is: using a force to move an object a distance (when both the force and the motion of the object are in the same direction.) Work is the transfer of energy through motion. Using your board: determine if the follow statement is work or not work and why..

  3. A scientist delivers a speech to an audience of his peers. • A body builder lifts 350 pounds above his head. • A mother carries her baby from room to room. • A father pushes a baby in a carriage. • A woman carries a 20 kg grocery bag to her car?

  4. Work = Force x distance • The unit of force is newtons • The unit of distance is meters • The unit of work is newton-meters • One newton-meter is equal to one joule • So the unit of work is a joule

  5. Formula for Work W=Fd Work = Force x Distance

  6. w = F d Work = Force x Distance Calculate: If a man pushes a concrete block 10 meters with a force of 20 N, how much work has he done? w=Fd W = 20N x 10m

  7. Check for Understanding • A weight lifter lifts a 500-N weight a distance of 2 m from the floor to a position over his head. How much work does he do? • Explain your answers.

  8. F = 500 N Distance = 2m Work = Force x Distance W = F x d W = 500 N x 2 m = The work that the weight lifter does is ________ Joules.

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