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Kinematics

Kinematics. Kinematics is the branch of physics that describes the motion of points, bodies (objects) and systems of bodies (groups of objects) without consideration of the causes of motion. Kinematics. One-dimensional kinematics. Movement along one axis.

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Kinematics

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  1. Kinematics • Kinematics is the branch of physics that describes the motion of points, bodies (objects) and systems of bodies (groups of objects) without consideration of the causes of motion.

  2. Kinematics • One-dimensional kinematics. Movement along one axis. • Distance – the total distance traveled from beginning to end. It always has a positive value. A scalar quantity – completely characterized only by magnitude. • Displacement – the change in position. A vector quantity completely characterized by magnitude and direction.

  3. Kinematics • Average speed – distance divided by elapsed time. • Average velocity – displacement divided by elapsed time. • Some units for speed and velocity are and any unit of length divided by a unit of time.

  4. Kinematics • Instantaneous speed – the speed at a given instant. • Instantaneous velocity – the velocity at a given instant.

  5. Kinematics • Average acceleration – the change in velocity divided but the change in time.

  6. Kinematics • Instantaneous acceleration – the acceleration at a given instant.

  7. Kinematics • Constant acceleration – when acceleration is constant, instantaneous acceleration is equal to the average acceleration. • In this course we will only be dealing with situations involving constant acceleration.

  8. Kinematics • In the following slide the subscript irefers to an initial condition, and the subscript frefers to a final condition.

  9. Table 2-4Constant-Acceleration Equations of Motion

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