unit 7.3

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Flashcards on unit 7.3, created by asra amir on 01/08/2017.
asra amir
Flashcards by asra amir, updated more than 1 year ago
asra amir
Created by asra amir almost 8 years ago
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Question Answer
gravity gravity:force of attraction between any two objects, for example between the earth and person.
gravitational field gravitational field:region of space in which an object will experience a force due to gravity.
mass mass:the amount of matter in a substance.
weight weight:the force of gravity pulling on an object ; measured in newtons
center of mass center of mass: a point representing the mean position of the matter in the body or system.
non cantact non contact: The force which acts on an object without coming physically in contact with it is called non-contact.
comparing mass and weight
falling falling: move from higher to lower level, without control.
terminal velocity terminal velocity : The point at which a falling object ceases to accelerate,but falls at constant speed, because its weight is balanced by air.
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