1. Motion-
Chapter 1 pp

2. Speed- Speed = distance a measure of how fast something is moving.
Equation-
Speed = distance
time

3. Use this to remember the equation!
Units for speed-
mi/h (mph)
km/h or
m/s
( / is read per and means divided by)
Use this to remember the equation!

4. 1.) What is the speed of a car that has gone 200 km in 4 hrs.?

5. Answer-
200km = 50 km/hr 4 hr

6. Acceleration- the rate of change in velocity
Acceleration = change of velocity
time interval

7. Units for Acceleration-
km/hr2 Reads kilometers per hour per hour
Each hour the speed changes so many kilometers per hour
m/s2 Reads meters per second per second
Each second the speed changes so many meters per second
km/h/s Reads kilometers per hour per second
Each second the speed changes so many kilometers per hour

8. 3. ) A car can go from 0 km/h to 90 km/h in 10 s
3.) A car can go from 0 km/h to 90 km/h in 10 s. What is its acceleration?

9. Answer- 90 km/h – 0 km/h = 9 km/h/s 10 s
These units are the hardest to
understand!
4.) What do these units mean?
This answer means that each second the car is speeding up 9 km/h

10. Free Fall (Vertical Velocity)-
an object falling free of all restraints
v = gt
v- velocity
g- acceleration of gravity
9.8 m/s2 on earth
during each second of fall the object gains 9.8 m/s in velocity
t- time

11. 6. ) A person jumps out of an airplane and has been falling for 3 sec
6.) A person jumps out of an airplane and has been falling for 3 sec., how fast are they going?
v = gt
= 9.8 (3)
= 29.4
m/s ?

12. Calculating Vertical Distance-
Freely falling objects only
Equation- d = ½ gt2
d = distance traveled
Units- meters
g = acceleration due to gravity
Units- m/s2
t = time of fall
Units- seconds

13. 7. ) A person jumps off a cliff and has been falling for 1. 3 sec
7.) A person jumps off a cliff and has been falling for 1.3 sec., how far did they fall?

14. Answer: d = ½ gt2 d = ½ x (9.8) x (1.3)2 d = 4.9 x 1.69
d = 8.28 meters
7.) Why are the units meters?
The units on 9.8 are m/s2.

15. Done!!