Unit v force
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Unit V - Force PowerPoint PPT Presentation


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Unit V - Force. Force An interaction between two different objects that results in a push or a pull. An object can’t exert a force on itself. Examples of forces. Friction All friction is parallel to the surface the object is sliding on and opposite the direction of motion

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Unit V - Force

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Unit v force

Unit V - Force


Unit v force

Force

  • An interaction between two different objects that results in a push or a pull.

    • An object can’t exert a force on itself.

  • Examples of forces


Unit v force

Friction

  • All friction is parallel to the surface the object is sliding on and opposite the direction of motion

  • Static friction, Ffs

    • When the object isn’t moving

  • Kinetic friction, Ffk

    • When the object is sliding


  • Unit v force

    Tension

    • The force is always co-linear with the string.

    • The tension is the same everywhere in the string.

    • A pulley simply changes the direction of the force.


    Force diagrams

    Force Diagrams


    Normal force

    Normal force

    • The normal force is always perpendicular to the surface that’s causing it.


    Force diagrams1

    Force Diagrams

    • Represent all the forces acting on the object using vectors

    • All forces are drawn from the object

    • Represent the object with a dot

    • Use “on-by” notation (on what? by what?)


    Examples

    Examples


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