Motion Continued Recap of Speeding Velocities

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Presentation transcript:

Motion Continued Recap of Speeding Velocities Velocity as a Vector Quantity Changing Velocity Acceleration Defined Sample Calculations Let’s look at some graphs Homework: Accelerate away.

Are we all done with Speeding Velocities???? Do you have any questions regarding Distance Time graphs? Are you thinking Slope of a Distance Time graph tells you Velocity????

Velocity…..it’s a Vector! Remember that Velocity is a vector quantity, which means it has MAGNITUDE AND DIRECTION.

Acceleration Acceleration is defined as the change in velocity over time. This means that whenever the velocity of an object is changing, it is ACCELERATING. Mathematically: a = Velocity (m/s) Time (s)

Acceleration a = Vf - Vi t The units of acceleration are m/s/s OR m/s2 What Does this really mean?????? An example…………………..

Consider the following Problem: Your car is at a stop light waiting for the light to change. When it turns green you PUNCH the Accelerator for 5.0 seconds and achieve a velocity of 72 m/s. What is your Car’s acceleration?

Consider the following Problem: If we roll a ball down a ramp for 8.0 seconds and it accelerates at a rate of 2.6 m/s2 What is your ball’s final velocity?

Consider the following Problem: We will ignore Air Resistance for the time being…… I fall off a cliff that is 2,600. m high. How fast am I traveling after 15.0 seconds? What is my speed? What is my velocity? What should I be thinking?

Homework/In class? Accelerate Away…..Let’s get it done before the weekend. Please Read Chapter 2 in your textbook……it is an easy read. Bring your moon walking shoes for next time???