1. Motion An object is in motion when it changes it position relative to to reference point.

2. 2 Ways to Describe Motion 1)Speed 2) Velocity

3. Speed The distance an object travels in a given amount of time. 100 meters 10 seconds

4. Calculating Speed Distance Time Speed = measured in units of: meters per second (m/s) s = d t

5. Showing Your Work Step 1: Write down the formula.

6. s = d t 100 meters 10 seconds

7. Showing Your Work Step 1: Write down the formula. Step 2: List the parts of the formula and what they are worth from the problem.

8. s = d t d = t = 100 meters 10 seconds 100 m 10 s

9. Showing Your Work Step 1: Write down the formula. Step 2: List the parts of the formula and what they are worth from the problem. Step 3: Rewrite the formula with the values.

10. s = d t d = 100 m t = 10 s 100 meters 10 seconds s = 100 m 10 s

11. Showing Your Work Step 1: Write down the formula. Step 2: List the parts of the formula and what they are worth from the problem. Step 3: Rewrite the formula with the values. Step 4: Crunch the numbers on a calculator.

12. Showing Your Work Step 1: Write down the formula. Step 2: List the parts of the formula and what they are worth from the problem. Step 3: Rewrite the formula with the values. Step 4: Crunch the numbers on a calculator. Step 5: Write down the answer and include the units.

13. s = d t d = 100 m t = 10 s 100 meters 10 seconds s = 100 m 10 s s = 10 m/s

14. Your final calculation should look like this: s = d t d = 100 m t = 10 s s = 100 m 10 s s = 10 m/s

15. Grading Calculations s = d t } 1 pt. d = 100 m t = 10 s } 6 pts. s = 100 m 10 s } 5 pts. } 3 pts. 15 pts. total

16. Velocity Speed in a given direction. 100 meters 10 seconds West

17. Calculating Velocity Distance Time Velocity = measured in units of: meters per second (m/s) v = d t

18. Difference Between Speed & Velocity SpeedVelocity distance time direction

19. Acceleration the rate at which velocity changes or the change of velocity over time 10 m/s 25 m/s 5 sec

20. Calculating Acceleration acceleration = (final velocity – initial velocity) time measured in units of: meters/second/second (m/s 2 ) a = (v f - v i ) t

21. Showing Your Work a = (v f - v i ) t v f = v i = t = a = (25m/s – 10 m/s) 5 sec 25 m/s 10 m/s 5 sec a = 3 m/s 2 25 m/s10 m/s 5 sec