1. Acceleration Velocity – Time Graphs

2. Acceleration: Rate at which the velocity increases or decreases Units: m/s 2 or km/h 2 or km/h/s

3. Velocity-Time Graphs: t (s) v (m/s) Area Under the Curve = Displacement Slope = Acceleration Constant velocity Acceleration = 0m/s 2 Uniform Motion Increasing velocity Acceleration constant Non-uniform Motion

4. The following shows the motion of a car. What is the acceleration of the car? What is the displacement of the car? Is this an ex. of uniform motion? 51015 20 t (s) v (m/s) 40 30 20 10 400m 2m/s 2 No

5. The following graph shows the motion of a cross-country runner training for a race. What is the displacement of the runner? What is acceleration of the runner from 4s to 10s? What is acceleration of the runner from 10s to16s? 132m 0m/s 2 -2m/s 2 Slows down/deceleration OR Acceleration in opposite direction

6. The graph below represents the velocity of a cyclist. What is the displacement of the cyclist from the 12 th to 20 th second? 20m 80m – 60m

7. A Camaro can go from 0km/h [N] to 100km/h [N] in 5.3s. What is the acceleration?

8. Jamaican sprinter Usain Bolt ran the 100m at an average velocity of 37km/h in 9.69s at the Beijing Olympics. What was his average acceleration?

9. A boy rolls a ball up a hill giving it a velocity of 4.5m/s[N]. Five seconds later the ball is rolling down the hill with a velocity of 1.5m/s[S]. What is the ball’s acceleration? Must consider direction!!!