Work is defined as the transference of energy produced by the motion of an object due to an applied force. Work is calculated by multiplying the force applied by the displacement of the object in the direction of the force. The unit of work is the Newton meter (Nm) or Joule (J). Examples are provided to demonstrate calculating work by multiplying force and displacement, such as a woman pushing a grocery cart 7 meters with a 500 Newton force, resulting in 3500 Nm of work.

1. Prayer

2. CALCULATING WORK

3. Work is defined as the transference of energy
that is produced by the motion of the point of
application of a force and is measured by
multiplying the force and the displacement of
its point of application in the line of action.

4.  Work is done when the force (F) applied to the object causes
the object to have a displacement (d) in the same direction as
the force applied. The symbol for Work is capital W
W = Fd

5. Unit for Work:
W = Fd
Unit of Work = Unit of Force x Unit of displacement
= Nm
Unit of Work = Nm or Joule (J)

6. Example:
Suppose a woman is pushing a grocery cart with a
500 Newton force along the 7 meters aside, how much
work is done in pushing the cart from one end of the
side to other side?

7. W = Fd
W = 500 N x 7m
= 3500 Nm or J

8. A boy is pulling a rope with applying 200N
force at 5m at the horizontal. Calculate the work
done.

9. Assignment
A book of mass 1 kg is on the floor. If the book is lifted
from the floor to the top shelf which is 2 meters from
the floor, how much work is to be done on the book.

10. References
www.youtube.com/watch?v=ntD7Dk_yObQ
Grade 8_science pdf

11. Prepared by:
Lanie Papa