3.1 Acceleration.

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Presentation transcript:

3.1 Acceleration

Acceleration The change in velocity over time Since it is based on velocity and velocity has direction acceleration also has direction

Changing Acceleration There are three ways to change acceleration Increase the Velocity (speed up) Decrease the Velocity (slow down) Change in Direction If any three of these occurs, we have a change in acceleration

Calculating Acceleration Acceleration = Final Velocity – Initial Velocity Time a = vf – vi t *note* If a problem tells us that an object is starting at or finishing at rest that means that the v = 0

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Try it again! A car advertisement states that a certain car can accelerate from rest to 90km/h in 9 seconds. Find the car’s average acceleration.

Try it Yet Again! A falcon accelerates from 15m/s to 22m/s in 4s. What is the eagle’s average acceleration?

Graphing Acceleration On a piece of graph paper, graph the data below then paste the graph into your notebook. Change in Speed Over Time Time (s) Speed (m/s) 1 8 2 16 3 24 4 32 5 40