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jbnorth | 10 months ago

What is deceleration but acceleration in the opposite direction? /s

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JohnKemeny|10 months ago

There's no need for the "/s" on the end, there. Deceleration, and especially in this case with a natural frame of reference, deceleration is negative acceleration.

rightbyte|10 months ago

More stringently, deceleration is decreasing the magnitude of the velocity vector, I would say.

If acceleration can be negative, so can speed. A negative speed with negative acceleration would not imply deceleration?