Kinematics 2
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Kinematics 2. Average and Instantaneous Velocity 2-2, 2-3. Speed. Speed is a scalar. No direction. Your car does not have a velocitometer . It does not tell you direction. Your car’s speedometer indicates the speed only.

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Kinematics 2

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Kinematics 2

Kinematics 2

Average and Instantaneous Velocity

2-2, 2-3


Speed

Speed

  • Speed is a scalar.

    • No direction.

    • Your car does not have a velocitometer. It does not tell you direction.

    • Your car’s speedometer indicates the speed only.

  • In physics, we must be very precise when using the terms speed and velocity.


Average speed

Average Speed


Velocity

Velocity

  • Vector

    • Speed plus direction

    • Speed is the magnitude of the velocity vector

    • Can be positive or negative to indicate the direction


Average velocity

Average Velocity


Instantaneous velocity

Instantaneous Velocity

  • The “average” velocity over an infinitesimally short period of time.


Average vs instantaneous velocity

Average vs Instantaneous Velocity


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