1. Motion and Forces Learning Target: I will be able to understand acceleration of an object and understand a velocity-time graph. 4 321 Student can analyze acceleration of an object using a velocity-time graph. Student can analyze the relationship between a distance-time and velocity- time graph. Student can understand acceleration and understand a velocity-time graph. Student understands each part of the formula to calculate acceleration. Student can explain acceleration and can somewhat explain a velocity-time graph. Student can explain the formula to calculate acceleration. Student can observe an objects motion but cannot explain acceleration and velocity-time graph.

2. Venn Diagram Relates distance and time Not a vector Average depends on total distance traveled Relates speed and direction Is a vector Average determined by the total distance from starting point SpeedVelocity Measured how fast or slow an object moves

3. Acceleration can be calculated from velocity and time  The change in velocity can be found by comparing the initial velocity and the final velocity of the moving object  The time interval over which the velocity changed can be measured.

4. Calculating Acceleration THIS IS TOUGH!!! Final Velocity – Initial Velocity Time V final – V initial T Acceleration-m/s²

5. Acceleration Problem! Julio starts sliding with a velocity of 1m/s south. After 3 seconds, his velocity is 7m/s south. What is Julio’s acceleration? Final Velocity – Initial Velocity Time 7 m/s – 1 m/s 3s 6 m/s 3s 2 m/s s 2 m/s 2

6. Practice! At the top of your notebook paper, please write the following formulas: Speed/Distance/Time Formulas: S=D÷TD=T·ST=D÷S Acceleration Formula: Final Velocity – Initial Velocity Time

7. Acceleration Practice A roller coaster car rapidly picks up speed as it rolls down a slope. As it starts down the slope, its speed is 4m/s. But 3 seconds later, at the bottom of the slope, its speed is 22 m/s. What is its acceleration? A four year old was riding her bicycle at 2m/s. She ran over a sand box and came to a complete stop in exactly 4 seconds. What is her acceleration?

8. Acceleration/ Distance Practice A lizard accelerates from 2 m/s to 10 m/s in 4 seconds. What is the lizard’s acceleration? A runner covers the last straight stretch of a race in 4 s. During that time, he speeds up from 5 m/s to 9 m/s. What is the acceleration in this part of the race? It takes Anya.25 hours to drive to school. Her route is 16 km long. What is Anya’s average speed on her drive to school?