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FORCE AND PRESSURE COMIC

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FORCE AND PRESSURE COMIC
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  • Slide: 1
  • Force PressureA push or a pull on an object is called force. Force changes the speed, state, dimension and direction of an object.
  • Ha, this is easy. A force changes the object's speed, direction, state or dimension.
  • An example would be when we pull a curtain and push a trolley.
  • Slide: 2
  • When the resultant force acting on the body is 0 then it is known as unbalanced force.
  • Balanced forces are equal in size and opposite in direction
  • they are 2 forces , balanced and unbalanced.
  • Kids, I am able to stand because the gravity is pulling me towards the ground, So, it can be also called GRAVITATIONAL FORCE.
  • Slide: 3
  • YES MA'AM
  • See, now the books fell down. So, there is no physical contact between the books and my hand, It is called NON - CONTACT FORCE.
  • See, as I am holding the books, there is a physical contact between the books and my hand, so it is called CONTACT FORCE.
  • Slide: 4
  • YES MA'AM
  • when a force acts over a large area of an object, it produces small pressure. But, if the same force acts over a small area of the object, it produce a large presssure.
  • Slide: 5
  • Ma'am, I tripped over the books. Ooouuch !! It hurts..
  • Laura, do you feel your hair being pulled by the computer Screen ?
  • Yes Ma'am, I do
  • It is because of ELECTROSTATIC FORCE. Before you came into the room, I was watching computer. So, the computer is the Charged Body and your hair is Uncharged. Hence, it was attracting your hair.
  • Slide: 6
  • MECHANICAL FORCE, the force exerted by machines.Eg - Engine of a Car, Closing and Opening of Door
  • MAGNETIC FORCE, the force exerted by a Magnet or Magnetic substances.Eg - Magnet attracts Iron,
  • Ma'am pressure = force --------area
  • Slide: 0
  • There are two more forces left. We have done it in class 7. Tell me what it is.
  • It's ok, Darling. It happened because of FRICTIONAL FORCE. It is the force that opposes motion when two or more objects are in contact move in respect to each other.
  • Notice this students. For holding the books, my muscles are being used too. So, it can be also called MUSCULAR FORCE.
  • Correct both of you!
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