What is work?
Demonstrate
the
following actions/tasks
a. Student 1 pushes
the blackboard.
b. Student 2 pulls a chair
from one end of the
room to the other end.
c. Student 3 pulls a
chair then return it to
its original place.
Activity
Is there work
done?
A girl pulling a cart
A man lifting a box to be
placed on the table
A girl carrying a bag
walking down a street.
A mango fruit falling
from a branch.
Analysis:
1. Which of the four situations
demonstrated/showed that work is
done? Why?
2. Why do you think situation
number 3 did not show that no work
is done? Why?
Agree or Disagree !!!
1. Work does not necessarily mean
physical labor.
2. If there is displacement in the
same direction of the force then
there is work automatically.
Agree or Disagree !!!
3. Work done at a very limited time
frame means there is high
power output.
4. If there is no force exerted, there
won’t be any work output.
Agree or Disagree !!!
5. If force and distance move at
an angle there is work one.
Identify situations in which
work is done and in which
no work is done. Write W if
the situation shows work
and NW if no work.
1. Lifting a box from the floor.
2. Pushing against the wall.
3. Pushing a box along the floor.
4. Carrying a bag of grocery
5. Raising a flag during the flag
ceremony