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# chapter2studyguide - 06:37 Chapter 2 Interactions and...

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06:37 Chapter 2: Interactions and Forces Forces : pushes and pulls that objects exert on each other Forces and Force Diagrams In force diagram, identify object of interest and all forces (pushes and pulls) being exerted on it by other objects at particular moment in time Force arrows! labeled to show what they represent Direction indicates direction of forces they represent Length indicates relative strengths of forces Strength of force is measured in units of newtons (N) Necessary to add information on strength If object is moving at moment in time in which drawing diagram, important to know in which direction Speed arrow above object length represents relative speed of object Energy does NOT equal force Writing Scientific Explanations Using Force Ideas Use force diagrams Also write narratives in terms of forces action on object and effect have on its motion Length of force arrow is not determined by amount of force Speed over time does get bigger Pushes and Slowing Down When speed arrow and force arrow are pointing in same direction, speed of cart is increasing

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chapter2studyguide - 06:37 Chapter 2 Interactions and...

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