1. 4-3-14
QOD#86
What is the motion of the bat swinging and the ball moving when a baseball player hits a homerun? Bat swing – circular or oscillating (depending on the swing) Ball moving – projectile & linear

2. Distance
4-3-14
Distance – how far an object traveled; length Distance equation: d = xf – xi Variables: x = position d = distance xf = final position xi = initial position

3. Ex1:
d = xf - xi
d = 20 m – 5 m
d = 15 m
0 m 5 m 10 m 15 m 20 m

4. d = 35 mi – 15 mi d = 20 mi Ex2: d = xf - xi
0 mi 10 mi 20 mi 30 mi 40 mi

5. Ex3: Sarah starts her drive at the 35 mile marker
Ex3: Sarah starts her drive at the 35 mile marker. She finishes her drive at the 80 mile marker. What is the distance she traveled?
d = xf – xi
d = 80 mi – 35 mi
d = 45 m

6. Ex4: Paul’s car odometer reads 120 miles in his driveway
Ex4: Paul’s car odometer reads 120 miles in his driveway. When he arrives at work it reads 147 miles. What is the distance he travels to work?
d = xf – xi
d = 147 – 120
d = 27 miles

7. Air Trolley Lab Purpose: To investigate motion and distance.
Question: How will the number of propeller winds affect the distance the air trolley travels?
Materials:
Air Trolley
Fishing Line
Meter Stick
Calculator

8. Procedures:
Start the air trolley behind the first black dot, which is marked on the fishing line.
Wind the propeller 10 times clockwise while holding the bottom of the trolley.
Let go.
Measure the distance in cm.
Repeat 2 more times (total of 3 trials).
Repeat steps 1-5 at 20, 30, and 40 winds.
Find the average of the trials.
Graph averages.

9. IV: DV: Constants: Hypothesis: If ________________, then __________, because _______________________.
Number of propeller winds
Distance Air Trolley travels
Same fishing line, turning propeller clock wise, air trolley starting place

10. (Title – Include IV & DV)
Distance (cm)
# of Winds
Trial 1
Trial 2
Trial 3
Average 10 20 30 40

11. QOD#87
Brad’s boat travels from the 3.5 mile marker to the 5.5 mile marker on Mississippi River. What is the distance the boat traveled? d = xf = xi d = 5.5 mi – 3.5 mi d = 2 mi

12. Speed
Speed – the distance traveled in a certain amount of time. Speed equation: v = d Δt
Variables:
v = speed/velocity
t = time
Δt = time interval or change in time
Δt = tf - ti

13. Ex1: A car left the house at 9:30 am and arrives at 11:30 am
Ex1: A car left the house at 9:30 am and arrives at 11:30 am. How long did the car drive?
Δt = tf - ti
Δt = 11: :30
Δt = 2 hours

14. Ex2: A car travels 240 miles in 4 hours
Ex2: A car travels 240 miles in 4 hours. Find the speed the car traveled.
v = d Δt
v = mi
4 h
v = mi/h or
60 mph

15. Ex3: A car leaves home at 4:00 pm, travels 600 miles, and arrives at 8:00 pm. How fast did the car travel? (speed)
v = d Δt
v = mi
4 h
v = mph
Δt = tf - ti
Δt = 8:00 – 4:00
Δt = 4 hours

16. Δt = 9:25 – 9:00 Δt = 25 min. d = 200 mi – 150 mi d = 50 mi
Ex4: Tom starts his trip at 9:00 am, at mile marker 150. He arrives at mile marker 200, at 9:25 am. Find the speed in miles per minutes.
v = d Δt
v = 50 mi
25 min.
v = 2 mi./min.
Δt = tf - ti
Δt = 9:25 – 9:00
Δt = 25 min.
d = xf - xi
d = 200 mi – 150 mi
d = 50 mi

17. QOD#88
Zach runs 3 miles in 0.5 hours. How fast did he run in mph? How fast did he run in miles/minutes? v = d / Δt v = 3 mi / 0.5 h v = 6 mph
v = 3 mi / 30 min
v = 0.1 mi/min.