Newton’s Law Note Taking Guide
Newton’s First Law of Inertia
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Newtons first law states that every object continues in a state of _______ , or of uniform speed
in a straight line, unless ___________________________ .
Objects continue to move by themselves
Forces are needed to overcome _____________ .
Object’s at Rest
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Objects at rest stay at rest and _________________ will change its state.
Objects in Motion
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In the absence of forces a moving objects tend to move in _________________________ .
Mass
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The more ________ an object has, the greater its _______ .
1KG= ____ N
SI unit of __________ is the Newton
N= KG m^2
Newton’s Second Law
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States that the net force on an object is equal to its _____________________ and points in the
direction of the __________________ .
F net = mass x acceleration
Acceleration = net force / mass
_________________ of an object is proportional to the net force acting on it
Mass and acceleration are __________________ .
W = mass x acceleration due to gravity
Free body diagrams:
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Maximum Speed is called the _______________ of the object.
F=ma Examples
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What is the net force needed to accelerate a 5-kg object at 3 m/s^2 ?
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To obtain a net force of 15N, the applied force must be 20N. That is, 20N in the forward
direction plus 5N in the backward direction gives a sum of 15N in the forward direction.
Friction
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Static Friction= the frictional force that occurs when ________________________ .
_________________= a constant force independent of the speed of the object
Newton’s Third Law
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States that whenever one object exerts a force on a second object the second object exerts
______________________ to the first object
Requires both an _______ and _________ force which are equal in strength and opposite in
direction
Acceleration = Force / Mass