Chapter 3: Motion, Acceleration and Forces
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23 Terms
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Friction
________: the force that opposes the sliding motion of two surfaces that are touching each other.
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Terminal Velocity
The ________ depends on the size, shape, and mass of a falling object.
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Weight
________ is a force and mass is a measure of the amount of matter an object contains.
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Newtons second law
According to ________, if the acceleration is zero, then the net force on the box is zero.
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Moon
On the ________, the gravitational force on the astronaut is less than it is on Earth.
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Earths Gravity
________ causes projectiles to follow a curved path.
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Chemical interactions
________ between atoms and molecules also are due to the electromagnetic force.
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Electricity
________ and magnetism are caused by the electromagnetic force.
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Newtons Second Law of Motion
________ describes how the forces exerted on an object its mass, and its acceleration are related.
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Gravity
________: an attractive force between any two objects that depends on the masses of the objects and the distance between them.
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Newtons Third Law of Motion
________: describes action- reaction pairs this way: When one object exerts a force on a second object, the second one exerts a force on the first that is equal in strength and opposite in direction.
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Momentum
________: the product of its mass and velocity.
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Air Resistance
________: opposes the motion of objects that move through the air.
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Gravitational Force
The weight of an object usually is the ________ between the object and Earth.
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Static Friction
________: the frictional force that prevents two surfaces from sliding past each other.
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Amount of Friction
The ________ between two surfaces depends on two factors- the kinds of surfaces and the force pressing the surfaces together.
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Momentum
________ is transferred in collisions.
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Friction
________ is due to microwelds formed between two surfaces.
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Static Friction
the frictional force that prevents two surfaces from sliding past each other
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Sliding Friction
the force that opposes the motion of two surfaces sliding past each other
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Centripetal Acceleration
Acceleration toward the center of a curved or circular path
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Centripetal Force
The net force exerted toward the center of a curved path
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Momentum
the product of its mass and velocity