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Motion in One Dimension Velocity. Motion – A change in position Motion.

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Presentation on theme: "Motion in One Dimension Velocity. Motion – A change in position Motion."— Presentation transcript:

1 Motion in One Dimension Velocity

2 Motion – A change in position Motion

3 Velocity – the rate of change in position (the time it takes to change position) It can be described as a “rate of motion.” It has direction. Usually in units such as mph, km/h, or m/s. An example of a velocity measurement would be 30mph to the east. Velocity

4 What is the difference between speed and velocity? Velocity is different from speed because speed does not specify direction, while velocity does.

5 Vector and Scalar quantities Scalar quantities have size or magnitude, but a direction is not specified. (temperature, mass, speed, etc.) Vector quantities have magnitude and a specific direction (velocity, acceleration, etc.)


7 Instantaneous velocity – the rate of motion at any given instant. (The car’s speedometer shows how fast the car is moving at any given instant.)

8 Constant velocity – velocity that does not change or vary. (A car’s cruise control is designed to keep the car’s speed constant without the driver’s foot on the accelerator pedal.)

9 Average velocity – the total displacement divided by the time interval during which it occurred. ( It takes into account that during the trip rate of change of motion may increase, decrease or stop at some points.)

10 Remember: Distance is used for speed calculation, while displacement is used for velocity calculation (shortest distance between initial position and final position).

11 Pg 39

12 Pg 39 Physics Serway/Faughn (Holt)

13 Pg 39

14 The Physics


16 Pg 40 Physics Serway/Faughn (Holt)

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