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25 Cards in this Set
- Front
- Back
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a device that combines two or more simple machines |
compound machine |
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force that must directly touch another object to affect it |
contact force |
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the measure of the distance an object travels in a specific amount of time |
speed |
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any device that changes forces or directions of forces |
simple machine |
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a point or support around which a lever rotates |
fulcrum |
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the amount of matter in something |
mass |
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a push or pull that causes something to change its speed or direction |
force |
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a force that does not need two objects to touch to make things change |
noncontact force |
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a type of simple machine that pivots on a fulcrum |
lever |
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the force that acts to slow the motion of things that are moving |
friction |
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the change in an object's position over time |
motion |
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a force that pulls two objects toward each other |
gravity |
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that place where an object is located |
position |
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the path that a moving object follows - measured with a compass |
direction |
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an object that is not moving that is used to describe an objects position |
reference point |
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a tool used to measure force or weight |
spring scale |
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a measure of the pull of gravity on an object |
weight |
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a tool for measuring length that is exactly one meter long - can measure distance |
meterstick |
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the upward push of a liquid or gas on an object. It works against gravity. |
buoyant force |
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the attraction between a magnet and a magnetic object |
magnetism |
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to pull toward |
attract |
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push away from each other |
repel |
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an object's speed in a particular direction |
velocity |
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occurs when an object speeds up, slows down, or changes direction - it is also a change in velocity |
acceleration |
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the tendency of an object to resist a change in motion |
inertia |
