Phy ch 4 summary

Phy ch 4 summary - Chapter 4 Forces A force is a push or...

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Chapter 4 Forces A force is a push or pull on an object. A force is a  vector .  It has both magnitude and direction. A force requires an  agent .  Something must do the pushing and pulling. A force is either a  contact force  or a  long-range force .  Gravity is the only long-range  force considered.  Two types of forces  1. Contact force 2. Long-range force Catalog of forces 1. Weight  The symbol  w . Weight acts equally on objects at rest or in motion.  The weight vector always  points vertically downward, and can be considered to act on the  center of mass  of the object. The weight is the only long-range force to be considered 2. Spring Force F net  is the superposition of  all the forces F 1 +F 2 + F 3 …  etc Use superposition NOT  sum
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     A stretched or compressed spring exerts a common contact force.  A spring can  either push (when compressed) or pull (when stretched). In either case, the tail of the vector force is attached to the contact point. There is no special symbol for the spring force, but we can use  F sp . 3. Tension Force
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This note was uploaded on 04/28/2008 for the course PHY 132 taught by Professor Rijssenbeek during the Spring '04 term at SUNY Stony Brook.

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Phy ch 4 summary - Chapter 4 Forces A force is a push or...

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