Speed, Velocity and Acceleration

1. Speed, Velocity and Acceleration

2. Speed • How fast or slow something moves. • Ex: Ms. McKinley’s Dodge Neon drives 70 mph down the 110 Fwy. • UNIT: distance unit divided by a time unit (ex: m/s, mi/h, km/h)

3. Velocity (Not the same as speed!) • Velocity tells how fast something is going AND in what direction • Change in Velocity can be due to: • Change in Speed • Change in Direction • Or Change in BOTH speed AND direction. • Example: Ms. McKinley’s Dodge Neon drives 70 mph NORTH on the 110 Fwy.

4. Acceleration • Change in VELOCITY • Can happen in 3 ways: • Speeding up (+) • Slowing Down (-) • Changing Direction

5. In Summary SPEED: change in POSITION over time VELOCITY: change in POSITION over time, including DIRECTION ACCELERATION: change in VELOCITY

6. Lesson 2 Review 1.2 Speed, Velocity, and Acceleration Acceleration is the rate of change of ____. Avelocity Bspeed Ctime Ddirection • A • B • C • D

7. Lesson 2 Review 1.2 Speed, Velocity, and Acceleration A car stopping at a red light is and example of a(n) ____. Adisplacement Bacceleration Cdirection Dvelocity • A • B • C • D

8. Lesson 2 Review 1.2 Speed, Velocity, and Acceleration It takes a runner 42.1 s to run a distance of 150 m. What is the runner’s average speed? A 0.28 m/s B 3.56 m/s C1.75 m/s D6.31 m/s • A • B • C • D