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1
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A circular frame or disk arranged to revolve around and axle
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2
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A wheel used for pulling or raising a weight
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3
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You climb this to get to different levels
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4
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Exertion of physical or mental power
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6
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Two or more simple machines
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7
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An object that can be used to cut things in half
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9
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An object that connects two wheels
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10
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An inclined plane that has threads winding around it
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12
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How a ship changes direction or speed
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14
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The strength of a push or pull
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15
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A rigid bar that pivots about one point
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17
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A surface where one side is higher than the other
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18
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A sloped or curved surface that joins different levels
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