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BY GROUP 1
Reference:
WWW.WIKIPEDIA.COM
WWW.SLIDESHARE.NET
WORK
In your own words, What’s Work?

Are you doing works when…
1. Lifting weights
2. Walking with a big bag of
Grocery in your hand?
3. Writing an essay.
Physics concept of WORK
Work is done only when a constant force
applied on an object, causes the object to
move in the same direction as the force
applied.
Ex.)
A guy pushing a table for 10m.
Considered as WORK
1.Push a heavy trolley for 5m

2.You lift your bag upwards by 1m
NOT considered as WORK

1.You push against a wall.
2.Pushing continuously on
the same spot.
3.Holding a chair and walking
around the classroom.
Work can be calculated
Work (J) = Constant Force (N) x
Distance moved in the direction of
the force (m)

W=N x m

Unit of measurement of work is (J)
Teehan’s triangle

W

F

D
Questions!
1. When is work done?
2. What does this represent (J)?
3. Give one example of Work.
4. How much work is done by a person who uses a
force of 27.5N to move a grocery buggy 12.3m?
5. 55,0o0J of work is done to move a rock 25m.
How much was the force applied?
Answers!!!!
Work is done only when a constant force
applied on an object, causes the object to
move in the same direction as the force
applied.
1.

2. Work
3. --------4. 338.25J

5. 2,200N
EXAMPLE
You are helping your mom push a heavy
shopping cart with a force of 20N and a
distance of 20m. What is the amount of
work?

W=N x m
= 20N x 200M

= 10,000 J 0r 10 KJ (kilo-joules)
Activity
Pick 3 of your best player per group and let them
line up at the back and they must answer the
question within 60 Seconds.
1. You and 3 friends apply a combined force of
489.5N to push a piano. The amount of
work done is 1762.2J. What distance did
the piano move?
ANSWER :

3.6m
THANKS FOR
LISTENING!!!!!!!
!!

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Work powerpoint

  • 2. WORK In your own words, What’s Work? Are you doing works when… 1. Lifting weights 2. Walking with a big bag of Grocery in your hand? 3. Writing an essay.
  • 3. Physics concept of WORK Work is done only when a constant force applied on an object, causes the object to move in the same direction as the force applied. Ex.) A guy pushing a table for 10m.
  • 4. Considered as WORK 1.Push a heavy trolley for 5m 2.You lift your bag upwards by 1m
  • 5. NOT considered as WORK 1.You push against a wall. 2.Pushing continuously on the same spot. 3.Holding a chair and walking around the classroom.
  • 6. Work can be calculated Work (J) = Constant Force (N) x Distance moved in the direction of the force (m) W=N x m Unit of measurement of work is (J)
  • 8. Questions! 1. When is work done? 2. What does this represent (J)? 3. Give one example of Work. 4. How much work is done by a person who uses a force of 27.5N to move a grocery buggy 12.3m? 5. 55,0o0J of work is done to move a rock 25m. How much was the force applied?
  • 9. Answers!!!! Work is done only when a constant force applied on an object, causes the object to move in the same direction as the force applied. 1. 2. Work 3. --------4. 338.25J 5. 2,200N
  • 10. EXAMPLE You are helping your mom push a heavy shopping cart with a force of 20N and a distance of 20m. What is the amount of work? W=N x m = 20N x 200M = 10,000 J 0r 10 KJ (kilo-joules)
  • 11. Activity Pick 3 of your best player per group and let them line up at the back and they must answer the question within 60 Seconds. 1. You and 3 friends apply a combined force of 489.5N to push a piano. The amount of work done is 1762.2J. What distance did the piano move? ANSWER : 3.6m