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An Introduction To

An Introduction To. FORCE. What is a FORCE ?. Any Ideas?. It’s NOT that !. A FORCE is like this…. A FORCE is simply a PUSH or a PULL . Here are a few examples of a FORCE …. P U S H. P U L L. P U S H. P U L L. P U L L. P U S H. PULL. P U S H. P U S H.

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An Introduction To

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  1. An Introduction To FORCE

  2. What is a FORCE? Any Ideas?

  3. It’s NOT that!

  4. A FORCE is like this…

  5. AFORCEis simply a PUSH or a PULL.

  6. Here are a few examples of a FORCE…

  7. P U S H

  8. P U L L

  9. P U S H

  10. P U L L P U L L

  11. P U S H

  12. PULL

  13. P U S H P U S H

  14. FORCE is represented using a unit called a NEWTON, which is named after Isaac Newton, who developed the Laws of Motion. The NEWTON is abbreviated as an “N”.

  15. What is NET FORCE? NET FORCE is the result of combining all the forces exerted on an object.

  16. Here, you see all these people pulling this large plane. This is a NET FORCE because there is more than one force being applied to move the plane. PULL WITH ALL YOUR MIGHT!

  17. The cheerleaders on the ground are using their combined forces or NET FORCE to throw the one cheerleader up into the air at a spin.

  18. A Boeing 747, using FOUR jet engines, uses NET FORCE to push its mass into the sky and fly. A Boeing 747 plane weighs 362,000 pounds!

  19. The parachute has multiple lines connected to the person and is pulling up from different directions. This NET FORCE that is spread across the parachute is needed to make it work correctly.

  20. Two people are necessary to lift this couch and move it. Without their NET FORCE, the couch would be too heavy!

  21. (Use NET FORCE and… ) JUST KEEP SWIMMING! http://www.flickclip.com/flicks/findingnemo8.html

  22. With all FORCES… there are balanced and unbalanced forces.

  23. If FORCES are balanced, then there is NO MOVEMENT. A magnetic force is pushing the pot up, but the force of gravity is pulling it down causing it to hover! This monster-truck pull-off isn’t going anywhere! http://www.youtube.com/watch?v=CMURy4AgZPA http://www.youtube.com/watch?v=jCM3kkeC4XM A balancedFORCE will have a NET FORCEequal to ZERO.

  24. A balancedFORCE: 11 nails on the head of a single nail! http://www.youtube.com/watch?v=BHWsagl9LDY

  25. An example of the mathematics involved that make a balancedFORCEequal to ZEROis shown below… Let’s say the person pulling on the LEFT is pulling with 100 Newtons of Force… 100 N 100 N And the person pulling on the RIGHT is also pulling with 100 Newtons of Force… 100 N – 100 N = 0 Newtons Because they are pulling equally in OPPOSITE directions, the two forces cancel each other out. This makes for NO MOTION.

  26. Another example of the mathematics involved that make a balancedFORCEequal to ZEROis shown below… The bison on the LEFT is pushing with 500 Newtons of Force… While the bison on the RIGHT is also pushing with 500 Newtons of Force… 500 N 500 N 500 N – 500 N = 0 Newtons Because they are pushing equally in OPPOSITE directions, the two forces cancel each other out. This makes for NO MOTION.

  27. If FORCES are unbalanced, then there IS MOVEMENT. Don’t play tug of war against a horse! An F22 Jet takes off using an incredible amount of force! http://www.youtube.com/watch?v=-srzT2olJ2Q http://www.youtube.com/watch?v=CObf-EOTkjI An unbalancedFORCE will have a NET FORCE greater than ZERO.

  28. An example of the mathematics involved that make an unbalancedFORCEgreater than ZEROis shown below… While the crane pulls with a force of 30100 NewtonsUPWARD. The mass multiplied by the gravity of the freight box gives the it 30000 Newtons of force DOWNWARD. 30100 N – 30000 N = 100 Newtons The crane overcomes the force of gravity and makes freight container move by pulling it up.

  29. Another example involving an unbalancedFORCEgreater than ZEROis shown below… The only force acting on the ball is gravity giving it only about 4.5 Newtons of force DOWNWARD. While the soccer player kicks with a force of 250 NewtonsAT AN ANGLE. The force of the kick would definitely overcome the force of gravity sending the soccer ball off hard and fast!

  30. Who do you think will win this battle?

  31. Any Questions?

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