Chapter 13: Work and Energy

1. Chapter 13: Work and Energy Reinforcing Key Concepts Section 1 Work is the use of force to move an object.

2. Standard S8P3: Force and Motion c. Work and simple machines

3. BIG IDEA Energy is transferred when a force moves an object. KEY CONCEPT Work is the use of force to move an object 1. Force is necessary to do work. Work is the use of force to move an object a certain distance. You can calculate work if you know the force and the distance over which it is applied. If you exert a force of 20 N as you push your desk 3 m across the floor of your bedroom, how much work have you done? Show the work you do to solve the problem. W = F x d W = 20 N x 3 m W = 60 N x m W = 60 J

4. 2. Objects that are moving can do work. Look at the scene below. On the blank lines, describe how each object is doing work. wind does work on the leaves moving wind does work on the sailboat the mallet does work on the croquet ball Gravity does work on the child

5. http://www.brainpop.com/science/motionsforcesandtime/work/

6. http://www.classzone.com/books/ml_science_share/vis_sim/mfm05_pg113_work/mfm05_pg113_work.htmlhttp://www.classzone.com/books/ml_science_share/vis_sim/mfm05_pg113_work/mfm05_pg113_work.html