A short slide about work

1. Mohammad Ali Khan
Dept. of Computer Science & Engineering
Faculty of Engineering
University of Development Alternative (UODA)

2. What is Work
• A force is said to do work if, when acting on a
body, there is a displacement of the point of
application in the direction of the force.

3.  Mowing the lawn
 Weight-lifting
 Moving furniture up
a flight of stairs
 Pushing against a
locked door
 Swinging a golf club
YES
YES
YES
NO
YES

4. Calculating Work
no movement
500N
10s
300kg 500N
6m
5s
100kg

5. • Work does NOT involve time, only
force and distance.
• No work is done when you stand in
place holding an object.
• Labeling work: w = F x d
• Newton X meter (N m)
– Which also = (kg x m2)
s2
Do you do more work when
you finish a job quickly?

6. Thank You