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Motion and Forces

Vocab

QuestionAnswer
force push or pull on an object
gravity pulling force between two objects, such as you and the Earth
weight how much gravity is pulling on an object
friction a force that occurs when one object comes into contact with another object
inertia the tendency of an object that is not moving to remain still, or of an object that is moving to continue to move, unless something else moves or stops the object.
motion this happens when an object changes position
speed how fast an object moves over a certain distance
acceleration any change in speed
Sir Isaac Newton an English philosopher and mathematician who formulated the laws of gravity
mass the amount of matter that makes up an object
electromagnet a magnet that is created by using electricity
magnetism a force that can push together or pull apart certain metals
magnetic field the area around a magnet where its magnetic force is effective
Elijah McCoy a famous inventor
Where are magnets the strongest? at their poles (north and south)
Popular Physics sets

 

 



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