Similes and metaphors are poetic devices. What does this
mean?

Both similes and metaphors are a poetic device because authors can be seen using them while writing their poem to give the reader a deeper understanding of the character and the setting. Metaphor is a figure of speech that talks about one this but refers to another. On the other hand, a simile is a figure of speech that compares two things together. Usually using the work "like" or "as".

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d.) circle motion requires a force to give it a centripetal acceleration.

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