An object is moving east, and its velocity changes from 65 m/s to 25 m/s in 10 seconds. Which describes the acceleration?

Acceleration is the change in velocity divided by the time: (25 m/s − 65 m/s) ÷ 10 s = −4 m/s². The negative sign means the acceleration is opposite the eastward direction of motion, so the object has negative acceleration of 4 m/s².

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