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26 Cards in this Set
- Front
- Back
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force
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a push or a pull that causes changes in motion
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friction
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a force that works against motion
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gravity
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the attraction between you andearth
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gravitational force
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all objects in the universe pull on one another
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magnetic
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an object that attracts iron
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magnetic force
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the force exerted by a magnet
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balanced forces
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forces that act on an object but cancel eachother
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unbalanced forces
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forces in one direction are stronger, so they dont cancel eachother
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net force
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a combination of all the forces acting on an object
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buoyant force
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an upward force
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work
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using an object to move through a distance
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simple machine
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a tool that makes a task easier by changing the strength or direction of a force or the distance over which the force acts
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lever
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a bar that makes it easier to move things
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fulcrum
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a balance point
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wheel-and-axle
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helps you open a door
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pulley
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a wheel with a groove for a rope
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inclined plane
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allows you to use less force over a distance to make work easier
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position
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the location of an object in space, and it is always relative to a frame or reference
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speed
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the distance an object travels in a certainamount of time
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velocity
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the measure of an objects speed in a particular direction
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acceleration
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the rate at which velocity changes over time
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inertia
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the tendancy of objects to resist a change in motion
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vibration
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a back and forth movement of matter
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volume
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the loudness of sound
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pitch
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a sound of how high or low it is
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frequency
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the number of vibrations in a second
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