Resultant Forces

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  • Created by: Annie
  • Created on: 11-12-13 17:03
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  • Resultant Forces
    • A stationary object remains stationary if the sum of the forces acting upon it - resultant force - is zero.
      • If the resultant force acting on an object is not zero, a stationary object begins to accelerate in the same direction as the force.
        • A moving object speeds up, slows down or changes direction.
        • Acceleration depends on the force applied to an object and the object’s mass.
    • An object may have several different forces acting on it, which can have different strengths and directions. But they can be added together to give theresultant force.
    • In a force diagram, the longer the arrow the bigger the force.
    • A resultant force acting on an object may cause it to begin moving or to change its movement.
      • This is a single force that has the same effect on the object as all the individual forces acting together.
    • Non Zero Resultant Forces
      • When all the forces are not balanced, the resultant force is not zero.
        • In this case, an object accelerates in the direction of the resultant force.
    • F = m × a
      • F = Resultant Force in Newtons
      • M = Mass of object in kilograms
      • A = Acceleration in meters per second squared

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