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Force.Ppt

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Force.Ppt

  1. 1. FORCE
  2. 2. What is Force? <ul><li>A push or pull </li></ul><ul><li>Force has a size & direction </li></ul><ul><li>All motion is created by a force </li></ul><ul><li>All forces are exerted by one object on another </li></ul><ul><li>**Motion does not have to occur </li></ul>
  3. 3. How is Force Measured? <ul><li>Measured in Newtons (N) </li></ul><ul><li>The more Newtons, the greater </li></ul><ul><li>the force </li></ul><ul><li>One tool to measure the force of </li></ul><ul><li>gravity is the spring scale </li></ul>
  4. 4. Examples of Force <ul><li>Fingers open a book </li></ul><ul><li>Push buttons on a keyboard </li></ul><ul><li>Gravity holds up a chair </li></ul><ul><li>2 magnets coming together </li></ul><ul><li>The force that results from combining forces </li></ul>Visible Forces Invisible Forces
  5. 5. How to Measure Net Force SAME DIRECTION = ADD TOGETHER 20N + 25N = 45N UNBALANCED FORCE because it produces MOTION This is the NET FORCE Person # 1 Pushing with 20N Force Person # 2 Pushing with 25N Force
  6. 6. How to Measure Net Force OPPOSITE DIRECTIONS = SUBTRACT 25N - 10N = 15N UNBALANCED FORCE because it produces MOTION This is the NET FORCE Team # 1 Pulling with 25N Force Team # 2 Pulling with 10N Force
  7. 7. How to Measure Net Force OPPOSITE DIRECTIONS = SUBTRACT 37N - 37N = 0N BALANCED FORCE because there is NO MOTION This is the NET FORCE Wrestler # 1 Pushing with 37N Force Wrestler # 2 Pushing with 37N Force

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