2. Work
• Work is done on an object when the object
moves in the same direction in which the
force is exerted.
• If no motion occurs then there will be no
work.
• Did you do work with your book bag on
your back walking to class?
3. Calculating Work
• Work depends on two things:
1. Force
2. Distance
• Which would require more work:
1. Lifting a 50N potted plant .5 m off the
ground to a table or a 100N potted plant
the same distance.
4. Calculating Work
• We can find the work it takes to move
objects with the following equation.
W= Force (F) x Distance (d)
• The following unit is used for work:
• Joule (J)
Now, find how much work it would take to
move each of the plotted plants.
5. Calculating Work
How much work would it take to move a 250
N car a distance of 5m?
How much work would it take to lift a 63 N
book a distance of 3m?
6. Calculating Work
How much work would it take to move a 250
N car a distance of 5m?
How much work would it take to lift a 63 N
book a distance of 3m?
