Newton's law of gravitation and Coulomb's law
Newton's law of gravitation and Coulomb's law both describe how the force between two objects changes with distance in the same mathematical way: the force gets weaker with the square of the distance between them. Gravitation depends on the objects' masses and is always attractive, while the electric force described by Coulomb's law depends on their electric charges and can be either attractive or repulsive.
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This final covers a lot of topics, so it's split into 4 parts. Each part includes a question from every one of its topics.
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