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Goal4Definitions
Science 5th Vocab
Question | Answer |
---|---|
speed | how fast an objects position changes with time at any given moment |
velocity | the speed and direction of a moving object |
gravity | the force of attraction between any two objects due to their mass |
inertia | the tendency of a moving object to move in a straight line or of any object to resist a change in motion |
friction | a force that opposes the motion of one object moving past another |
mass | a measure of the amount of matter in an object |
weight | the force of gravity between earth and an object |
action | the force one object applies to a second |
reaction | the force with which an object responds to an action |
force | a push or pull exerted by one object on another, causing a change in motion |
unbalanced | forces that do not cancel each other out when acting together on a single object |
balanced | forces that cancel each other out when acting on a single object |
simple | a machine with few moving parts, making it easier to do work |
lever | a simple machine made of a rigid bar and a pivot point, called the fulcrum |
fulcrum | the pivot point of a lever |
effort | the part of a lever that applies force to the resistance arm |
resistance | the part of a lever that applies force to the load and the machine acts against |