# Newton’s Three Laws Of Motion

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• ﻿Newton’s First Law Of Motion
• ﻿An object in motion stays in motion unless acted upon by an unbalanced force
• ﻿An object at rest stays at rest unless acted upon by an unbalanced force
• ﻿Also known as the Law of Inertia
• Unbalanced forces cause objects to accelerate and balanced forces do not produce acceleration﻿﻿
• ﻿Force is measured in Newtons (N) and acceleration is measured in meters per second squared or meters per second per second (m/s/s)
• ﻿Mass is typically measured in kilograms (kg)
• Newton’s Third Law Of Motion﻿
• ﻿For every action, there is an equal reaction that is the opposite of the original action
• Forces﻿﻿ always act in pairs
• ﻿Also know. as the Law of Reaction﻿
• ﻿﻿﻿Mass is the measure of inertia. Objects with large mass have more inertia and objects with small mas have less inertia.
• Inertia is the tendency of an object to resist any change in motion ( stay at rest )﻿﻿
• ﻿﻿Inertia is when a moving object wants to stay moving or when the object is resting stays resting
• Newton’s Second Law Of Motion﻿
• The unbalanced force acting upon an object is equal to the mass of the object times the acceleration of the object ( F = m x a )﻿﻿
• ﻿Also﻿﻿ known as the Law of Acceleration
• ﻿The acceleration of an object depends on the mass of the object and the size and direction of the force that is acting on the object
• The action force is the force that is acting in one direction
• The reaction force is the force﻿﻿﻿ ﻿acting in the opposite direction of the action force
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