Acceleration.

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Presentation transcript:

Acceleration

Is speed usually constant? What happens to the speed of each object depicted below?

Is speed usually constant? What happens to the speed of each object depicted below?

Is speed usually constant? What happens to the speed of each object depicted below?

Is speed usually constant? What happens to the speed of each object depicted below?

What 2 types of speed exist? Average speed For most moving objects, speed is not constant Because speed can change so much, we calculate average speed Average speed = Total distance/Total time

What is Velocity? In order to describe motion completely, you need to know: Speed Direction of motion Velocity = Speed in a specific direction .

What is Velocity? Examples Storm tracking We need to know the speed of the storm = 25km/hr We need to know its direction = eastward Then we know its velocity = 25 km/h eastward

What is Velocity? Examples Air traffic controlling We need to know the speed of the plane = 900km/hr We need to know its direction = westward Then we know its velocity = 900 km/h westward