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Newton’s Second law of Motion: • Acceleration depends on an object’s mass and amount of force on it. • The law is written as a=F/m • This law is explain as: An object’s acceleration equals the net force (the combined amount) applied to the object divided by the object’s mass. Two results of the law: 1. For a given net force, objects with greater mass have less acceleration…meaning that forces can slow acceleration. 2. For objects of a given mass, a greater force results in greater acceleration. Object with greater mass accelerate more slowly than objects of lesser mass per given force (equal forces applied). Newton’s Third Law of Motion: • Anytime one object exerts a force on another object a pair of forces acts. This is the action-reaction pair of forces • Object A exerts a force on object B, then object B exerts a force on object A that is equal in strength and opposite in direction. • Forces have the same strength but act is opposite directions. Momentum: Quantity that measures both the mass of an object and how fast the object is moving(velocity). Momentum is mass times velocity. A measure of velocity is meters/seconds A measure of momentum is kilogram – meters / second. The greater an object’s momentum, the more force it takes to bring it to a stop. How Momentum is conserved: Momentum does not change if there are no outside forces acting on it |