When the net force acting on a body is zero, its acceleration must be zero, meaning that the velocity remains constant.
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Newton’s First Law
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Superposition of Forces
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Inertia
It refers to how much an object resists a change in its velocity and is measured by mass.
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Newton’s Second Law
This law reveals that force is a vector parallel to the acceleration.
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Newton’s Second Law
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pounds or newtons
Force is measured in \____________.
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Newton’s Third law
For every force exerted by one object on another, there is another force equal in magnitude and opposite in direction that is exerted back by the second object on the first.
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Mass
A measure of inertia and is the proportionality constant that relates force to acceleration in Newton’s second law.
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Kilograms
SI Unit of Mass
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Weight
The magnitude of the force exerted on an object by the closest nearby planet (typically Earth) according to the formula.
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Gravitational Force
The most prevalent force in the universe, pulling together on any two objects with mass in the universe.
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Normal Force
Denotes FN. Its magnitude is determined by Newton’s second law. Always perpendicular.
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Frictional Force
Force that resists the sliding or rolling of one solid object over another.
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Static Friction
Objects are not sliding relative to each other.
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Static Friction
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Kinetic Friction
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Kinetic Friction
Objects are sliding relative to each other.
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Tension Force
A force that develops in a rope, thread, or cable as it is stretched under an applied force.
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Static equilibrium (object at rest)
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centripetal force
The \_________ is the net force required for circular motion . It can be provided by any number of forces such as tension, normal force, gravity, or friction.