1. MOTION is a change in position of an object with respect to time
any movement or change in position or place
is always observed and measured relative to a frame of reference and its change in position to another reference frame

2. 60 kilometers / 2 hours = 30 km/hr or 30 kmh
SPEED
Distance an object travels in a unit of time
s = d / t
speed = distance/ time
Example: Bob drove to his parents house that was 60 kilometers away it took him 2 hours, How fast was he traveling?
60 kilometers / 2 hours = 30 km/hr or 30 kmh

3. How do we figure units? the UNIT for speed is
Any distance unit over any time unit.
Some distance units examples: m, cm, km, etc.
Some time units examples are: hr, min, days, month, years, etc.
***when expressing units with division a forward slash means per
ex. mi/ h (miles per hour) or m / s or ft / h

4. Solving for another variable
-if s = d / t we can solve for any of these three variables
-to solve for distance we would cross multiply both sides by the time, cancel, and then solve
s = d / t t * s = (d / t) *t (the t’s cancel)
to give you d = s * t
- to solve for time you do the same with an extra step
s = d / t t * s = (d / t) *t the t’s cancel
to give you d = s * t then you divide by s on both sides d/ s = s * (t/ s) s’s cancel
to give you t = d / s

5. 3 Types of Speed 1- instantaneous- speed at any specific instance
2- average- total distance over a period of time interval, accounts for speed variations during time.
ex. 32 km +13 km = 45 km = total distance
2 h + 1h = 3h = total time
avg. speed = 45 km/ 3 h = 15 km/h
3- constant- when speed of an object does not vary. ex. satellite

6. Answer these Q’s then make up 6 of your own and answer them
1. A boat is traveling at a speed of 70 km per hour. It has to travel
a distance of 210 km. How long will it take?
2. A car takes four hours to reach its destination. The distance was
340 miles. What was its speed?
3. A car travels 300 km in six hours. What is the speed of the car?
4. What is the speed of a jet plane that flies 7200 km in 9 hours?
5. The speed of a cruise ship is 50 km/hr. How far will it travel in
14 hours?
6. The speed of a rocket is 16,000 km/hr, and it will take 66 hours
to complete its mission. How far will it go?
7. What is the speed of a cyclist that travels 60 km in 2 hours?
8. A snail wants to participate in the Boston Marathon, a distance
of 26 miles. His top speed is 0.01 miles per hour. Assuming he
maintains top speed for the entire race, how long will it take him to
finish?
9. A rocket takes off at 8000 miles per hour and travels for 10 hours? What distance has the rocket traveled?
Answer these Q’s then
make up 6 of your own
and answer them
All on one paper