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« B         Main » Kinematics & Dynamics » Acceleration   ### Acceleration

 Learning Objectives After completing this lesson you will be able to: Define the following terms: average acceleration, constant acceleration, and instantaneous acceleration. State the SI unit for acceleration. Distinguish between and gives examples of uniform and non-uniform acceleration. Determine the average velocity of an object graphically and algebraically. Estimate the instantaneous acceleration of and object graphically. Distinguish among positive, negative, and zero acceleration. Analyze velocity-time graphs to determine constant acceleration, average acceleration, and instantaneous acceleration. Obtain instantaneous accelerations from a velocity-time graph and use them to develop an acceleration-time graph. Solve problems involving acceleration using the equations for uniformly accelerated motion. Relate and understanding of acceleration to familiar experiences and practical applications.    Key Concepts Average acceleration ( ) is the change in an object's velocity during some elapsed time. Constant acceleration occurs if an objects velocity changes by equal amounts in equal periods of time. It is an example of uniform acceleration. Instantaneous acceleration is the objects acceleration at a specific moment in time. Acceleration is a vector quantity. Its SI unit is m/s/s or . The slope of a velocity-time graph determines the objects acceleration. Negative acceleration is sometimes called deceleration. An object traveling at a constant velocity has an acceleration of zero. The equation for average velocity can be determined using a velocity-time graph. There are several equations that can be used when dealing with uniform acceleration. An object rolling down an inclined plane has a constant acceleration. The slope of the incline determines the magnitude of the acceleration.        