# Kinematics 2 - PowerPoint PPT Presentation

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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

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.

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

### Velocity

• Vector

• Speed plus direction

• Speed is the magnitude of the velocity vector

• Can be positive or negative to indicate the direction

### Instantaneous Velocity

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