The word work has serveral meanings to different people. Your parent or gardian probably leaves for work every day. Homework is something that a teacher assigns you to do at home on your own time. In science, work has a different meaning.
| Work is the result of a force applied to
an object and the measure of the distance that object has moved.
In mathematical terms, Work = Force X Distance. In this equation
force is measured in Newtons (N) and distance is measured in meters
(m). One Newton-meter is equal to one Joule (J). Joules therefore
define the amount of work that has been done on an object. Machines
do work. In order for work to be done on an object, a force must move
it. If you were to push on a brick wall all day as hard as you could,
even though you may feel like you have done work, no work would have
been done since the wall never moved. |
 |
Complete the following work problems. The first one has been done as an
example for you. Remember Work (J) = Force (N) X Distance (m)
1. 20J = 10N X 2m
2. 20J = force? X 2m
3. work? = 10N X 500m
4. work? = .2N X 600m
5. 5000J = 500N X distance?
6. work? = 82N X 76m
7. work? = 820N X 205m
8. work? = 20N X 0m
9. Here's one to think about. If you drove Kip's oxidized red landcruiser with broken bumper 5,000 miles and then parked it exactly where you started, would you have done any work?
