All the vocabulary for Level 2 of the Forces menu
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| lubricant | a substance that decreases friction between objects, such as oil, wax, or grease.
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| sliding friction | a larger amount of friction than rolling friction
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| rolling friction | a smaller amount of friction than sliding friction
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| buoyancy of gases | a smaller amount of buoyancy than liquids
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| buoyancy of liquids | a larger amount of buoyancy than gases
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| repel/repulsion | to push apart
(N to N or S to S on magnets, + to + or – to – in electricity)
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| attract/attraction | to pull together
(N to S on magnets, + to – in electricity)
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| steep incline | an incline that requires more force to move an object up it than a shallow incline
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| shallow incline | an incline that requires less force to move an object up it than a steep incline
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| constant acceleration | on a VELOCITY vs. TIME graph, this is shown as a straight diagonal line with an upward slope.
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| decreasing acceleration | on a VELOCITY vs. TIME graph this is shown by a "downward" curve that is flattening out.
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| increasing acceleration | on a VELOCITY vs. TIME graph this is shown by an "upward" curve that is going towards vertical.
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| incline | a ramp or slope
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| force | A push or a pull. You must know these forces: gravity, magnetism, electric force, buoyancy, friction, atomic force.
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| gravity | A force that accelerates all objects equally. (So a basketball and a golf ball fall at the same rate.) *** Gravity is greater for objects with larger mass, and objects that are closer together. Gravity decreases with less mass and far distances.
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| mass | Mass is the amount of matter (atoms) in an object. Mass can only change if you remove or add matter.
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| weight | Weight is how much gravity pulls an object downward onto a scale.
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| mass vs. weight | If you travel from one planet to another, your mass does not change, but your weight changes, depending on the gravity of the planet.
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| projectile motion | A projectile is a object that is propelled, like a cannonball from a cannon.
A projectile falls toward the Earth at the same rate as a dropped object – if it’s the same object from the same height.
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
rhk9
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