Work :

Objectives:

1. Define work in terms of force and distance.

2. Explain the units of force and work.

3. Calculate work, force, and distance using the formula W = F x d.

Key Terms:

work joule

Web Resources:

http://www.glenbrook.k12.il.us/gbssci/phys/Class/energy/energtoc.html

Notes:

** Work**:

The
amount of force times the a time interval is equal to the impulse of an
object. The distance that the object moves times the force is work.
Both are related but different. Work is a force acting through a distance.

There
MUST be a net FORCE. | |

The force MUST make the object MOVE in the direction of the force. |

If
I push against the wall with all of my might, am I doing work? NO.

If
I carry a heavy weight across the room, am I doing work? NO.

It
is important to remember that work does
not involve time.** ONLY**
involves the application of force and the movement of an object in the direction
of the force.

Formula: Work
= F * D

For work done in a vertical direction you can use the alternative equation.

Work = mgh (mass x gravity x height)