1. Motion-
Chapter 1 pp

2. Speed- Speed = distance a measure of how fast something is moving.
(rate of change
of distance)
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. 2.) What is the time it took for a car traveling 65 mph to go 800 mi.?

7. Answer-
800mi = 65 mph t

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

9. 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

10. 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?

11. 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

12. 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

13. 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

14. 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

15. 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?

16. 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.

17. Super man saves little boy?
Height of Niagra falls is 53 meters
How far does the boy fall before superman catches him?
What speed is the boy going just before he is caught?

18. Done!!