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### 5 Cards in this Set

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 acceleration change in velocity per unit of time What is the acceleration due to gravity? 9.8 m/s/s (meters per second per second). The velocity increases by 9.8 m/s every second something falls. What is the difference between speed and velocity? Speed is a general measure of how fast something is moving (distance per unit time). Velocity is a specific measure which must include the direction of movement. How do you find the average velocity of something moving at constant acceleration? Add the initial and final velocities and divide by 2. What is constant acceleration? Acceleration at a constant rate - the acceleration doesn't change.