1. Energy and motion
Ms. Pici

2. Flashback to childhood
For each playground item, tell what it is, the action you perform to it and the reaction it has as a result.

4. Speed and motion Define MOTION: A change in position.
Define SPEED: The rate of motion (distance per time).

5. Speed that doesn’t change
There are 3 kinds of speed:
Real Life Example Kind of Speed Definition
You set the “cruise control” on your car at 55 mph so you don’t get pulled over.
Constant Speed
Speed that doesn’t change
You glance down at your speedometer to see how fast you are going now because the policeman just used his radar gun to “clock” your speed.
Instantaneous Speed
Speed at a given moment
You traveled to your friends on your bike. They live 5 miles away and it took you 50 minutes to get there.
Average Speed
S =
Distance
Time
S =

6. FORMULA FOR CALCULATING AVERAGE SPEED
Graphs showing speed are very common. What two variables are need to create a speed graph? Time and Distance
Which is the independent variable and should be plotted on the x- axis?
Time
Which is the dependent variable and should be plotted on the y- axis?
Distance

7. Graphing Speed
Graph the TIME (on the x) and the DISTANCE (on the y) data.
Make sure to include axes labels, an appropriate scale, plot points, a line, and a good title.

8. Using the formula R = D divided by T, calculate the speed and round to the nearest tenth
TIME (hour)
DISTANCE (miles) 1 4 2 8 3 12 16 5 20

9. 0.0 mph 4.0 mph 4.0mph TIME (hour) DISTANCE (miles) SPEED (MILES/HOUR)
S = d/t
0.0 mph 1 4
4.0 mph 2 8
4.0mph 3 12 16 5 20

11. Questions about the graph
Was this car travelling at a constant speed?
How do you know?
Predict the distance this car would travel in 10 hours.
How did you get your answer?

12. Answers to graphing questions
Was this car travelling at a constant speed? Yes
How do you know? Linear; straight line = slope
Predict the distance this car would travel in 10 hours. 40miles
How did you get your answer? S = (20)(2) or 4 x 10 = 40 miles

13. Newton's Laws

15. FOR EACH SPORT BELOW, EXPLAIN WHEN YOU WOULD SEE EACH OF NEWTON’S LAWS IN ACTION.
LAW ONE
LAW TWO
LAW THREE
FOOTBALL
BOWLING
SWIMMING