If you throw a stone downward with a speed of 2.5m/sec., what is it's acceleration when compared to a stone that is thrown downward at 15.0m/sec.? What formula would I start with to get the answer and what is the final answer?

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If you throw a stone downward with a speed of 2.5m/sec., what is it's acceleration when compared to a stone that is thrown downward at 15.0m/sec.? What formula would I start with to get the answer and what is the final answer?

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Physics: Principles with Applications

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