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Forces/Newton's Laws (Types of Forces (Friction: The force that…
Forces/Newton's Laws
Newton's Laws
Newton's 1st Law: An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
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Inertia: The object's resistance to a change in it's velocity, such as direction of motion or speed.
Equilibrium: The state in which the opposing forces or influences are perfectly balanced. This means there is no acceleration or direction change. Just constant velocity all the way through.
Newton's 2nd Law: The acceleration of an object is dependent upon two variables - the net force acting upon the object and the mass of the object.
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The big equation: Fnet = m • a. Where a is acceleration, m is mass, and Fnet is net force.
Newton's 3rd Law: For every action, there is an equal and opposite reaction.
Newtons: The common unit of measurement used to measure force. It is named after Sir Isaac Newton, who discovered forces.
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Types of Forces
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Normal Force: A force perpendicular to a surface an object is resting on that prevents the falling through the surface of said object.
Inclined Planes
The normal force is awkward, as it is an an angle to the ground, but still perpendicular to the inclined surface the object is sitting on. As a result, it will be a little harder to envision the force vector in comparison to everything else.
Action-from-a-distance forces: When the object applying the force is NOT in physical contact with the other object. One example of this is gravity.
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The acceleration of an object depends directly upon the net force acting upon the object, and inversely upon the mass of the object. This means that less mass means more acceleration, and more net force means more acceleration.
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Inversely: Values are inversely related when they change in opposite directions, i.e. mass decreases to increase net force.
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Aerodynamic Drag: The fluid friction experienced and seen by an object falling or moving through the air.
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The force of gravity is also at an angle, but this time at an angle to the inclined surface and object. It is perpendicular to the ground.
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Contact Forces: When the object applying the force is in contact with the other object. One example of this is friction.
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