Vocabulary Words

Science Force and Motion

Force

A push or pull; measuring in Newtons using a spring scale.
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Balanced Forces

Forces are equal but in opposite directions.
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Unbalanced Forces

Forces are unequal and cause an object to accelerate.
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Inertia

The tendency of an object to resist motion.
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Friction

A force that opposes motion between two objects that are touching and causes an object to slow down or come to a stop.
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Speed

Determined by dividing the total distance by the total time it took to cover that distance.
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Velocity

Speed in a certain direction such as 70 mph east.
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Acceleration

The rate of change in velocity; can mean speeding up, slowing down or changing direction.
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Gravity

An attractive force that exists between all objects that have mass; the greater the mass, the greater the gravity between the objects.
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Air resistance

The frictional force between air and objects moving through it.
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