# Resultant Forces

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• Created by: Annie
• Created on: 11-12-13 17:03
• 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