Work Whoa!!! Now I do!!!  I just don’t have any energy 

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Presentation transcript:

Work Whoa!!! Now I do!!!  I just don’t have any energy  The force, F, pushes the box for a short distance. This causes the box to start moving!!!!!! It gains energy!!!! F

Work If a force, F, is used to move an object a displacement, d, then the force does work on the object. W = Fd F d

Units for Work The units for force are Newtons (N) and the units for displacement are meters (m). Since Work is equal to force times displacment. We could use a Newton-meter (N·m). But the more common unit is the Joule (J) 1 J = 1 N·m 1 J is defined as the amount of work for 1- N of force to move an object 1-m

In order for work to be done: There must be a force applied. The object must have a displacement. The force must be responsible for the displacement.

If he lifts it twice, how much work would he do? The weight lifter in the video lifts 263.5-kg a distance of 2.43-m. How much work does he do during one lift? If he lifts it twice, how much work would he do? Watch Video

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