The document discusses the concept of work in physics. It defines work as a force acting on a body and causing displacement in the direction of the force. It provides examples of activities that do and do not qualify as work, such as mowing the lawn and pushing against a locked door. The document also explains how to calculate work using the formula of work equals force multiplied by distance and discusses the units of Newton meters.

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