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Physics

Newton's Laws

Last updated 4:51 PM on 10/6/22
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22 Terms

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reaction force
The ________ is what propels the rocket.
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SI system
The unit of force in the ________ is the newton (N)
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Acceleration
________ is proportional to force and inversely proportional to mass.
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Weight
________ is the force exerted on that object by gravity.
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Mass
________ is not weight: ________ is a property of an object.
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Static friction
________ is the frictional force between two surfaces that are not moving along each other.
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4 3 Mass Mass
________ is the measure of inertia of an object.
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gravitational force
(4- 1) (4- 2) Weight is the ________ on an object.
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SI system
In the ________, mass is measured in kilograms.
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Lecture PowerPoints Chapter 4 Physics
Principles with Applications, 7th edition Giancoli © 2014 Pearson Education, Inc
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Chapter 4 Dynamics
Newtons Laws of Motion
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Contents of Chapter 4 Force Newtons First Law of Motion Mass Newtons Second Law of Motion Newtons Third Law of Motion Weight-the Force of Gravity; and the Normal Force Solving Problems with Newtons Laws
Free-Body Diagrams Problems Involving Friction, Inclines 4-1 Force A force is a push or pull
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Inertial reference frames
An inertial reference frame is one in which Newtons first law is valid
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Mass is not weight
Mass is a property of an object
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Newtons third law
Whenever one object exerts a force on a second object, the second exerts an equal force in the opposite direction on the first
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Rocket propulsion can also be explained using Newtons third law
hot gases from combustion spew out of the tail of the rocket at high speeds
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Helpful notation
the first subscript is the object that the force is being exerted on; the second is the source
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4-7 Solving Problems with Newtons Laws
Free-Body Diagrams 1
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For kinetic-sliding-friction, we write
μk is the coefficient of kinetic friction, and is different for every pair of surfaces
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An object sliding down an incline has three forces acting on it
the normal force, gravity, and the frictional force
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Summary of Chapter 4 Newtons first law
If the net force on an object is zero, it will remain either at rest or moving in a straight line at constant speed
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Newtons second law
Newtons third law