Net Force and Motion Concepts

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Newton's Second Law Equation

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Newton's second law can be written as an equation. The equation shows how acceleration, mass, and net force are related to each other: a = F/m or F = m \times a In the equation, a is acceleration (in meters per second squared), m is mass (in kilograms), and F is net force (in newtons, N). One newton is equal to one kilogram multiplied by one meter per second squared.

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Equation for force using Newton's Second Law

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The equation is F = ma.

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Definition of Inertia

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Inertia is the resistance of any physical object to any change in its velocity. This includes changes to the object's speed or direction of motion.

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Effect of Mass on Acceleration

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According to Newton's second law, the greater the mass of an object, the less it will accelerate when a given force is applied. This is because acceleration is inversely proportional to mass.

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Example of Newton's Second Law

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If you push a car and a bicycle with the same force, the bicycle will accelerate more because it has less mass compared to the car.

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Definition of Net Force

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Net force is the overall force acting on an object when all the individual forces acting on it are combined. It determines the object's acceleration according to Newton's second law.

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Units of Force

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The unit of force in the International System of Units (SI) is the newton (N). One newton is the force required to accelerate a one-kilogram mass by one meter per second squared.

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Relationship between Force and Acceleration

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According to Newton's second law, force is directly proportional to acceleration. This means that if the force applied to an object increases, the acceleration of the object also increases, provided the mass remains constant.

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Newton's First Law

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An object at rest will remian at rest, and an object moving at a constant velocity will continue to move at a constat velocity unless acted upon by an outside force.

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Newton's Third Law

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Newton's third law states that for every action, there is an equal and opposite reaction. This means that forces always occur in pairs, and the two forces are of equal magnitude and opposite direction.