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15 Cards in this Set
- Front
- Back
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balance
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Something is balanced when it stays in a position on its own without being held there.
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counterweight
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Counterweights should be placed low on an object in relation to the balance point.
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balance point
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The place on which an object balances is called the balance point.
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stable position
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A stable position is one that is steady; the object is not falling over.
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mobile
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A mobile is a system of blanced beams and hanging objects.
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axis
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The point in a circle at which an object spins around it.
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linear motion
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When an object moves from one location to another.
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force
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A push or a pull that is needed to make an object move.
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spin
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When an object moves in a circle arount an axis (central point).
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rotate
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When one object moves in a circle (or oval) around another object [like the earth moving around the sun].
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motion
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The act of moving.
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axle
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A rod or shaft to which wheels can be attached.
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rolling
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An object like a wheel or a marble that moves from one place to another while turning itself at the same time is rolling.
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slope
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A surface that is higher at one end than the other.
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gravity
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A downward pull by the earth's center.
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