Name__________________
Period #________________
Physics at Eaton Canyon
Riding the Metro Section:
While on the metro fill out the following data table. Use dimensional analysis to convert mi to km and vice
versa. Remember that 1 mi = 1.6 km = 1600 m. and 1 km = .62 mi. = 998 m. Use a stopwatch, cell phone, or
iPod to figure out times.
A. Union Station Chinatown
B. ChinatownLincoln
C. Lincoln HeightsArroyo
Heights/Cypress Park
Station
mi
m
time
speed
mi
m
time
speed
mi
m
time
speed
(s)
(m/s)
(s)
(m/s)
(s)
(m/s)
1240
1.43
.61
D. Arroyo Station Southwest
E. Southwest Museum Highland F. Highland ParkSouth Pasadena
Museum
Park
mi
m
time
speed
mi
m
time
speed
mi
m
time
speed
(s)
(m/s)
(s)
(m/s)
(s)
(m/s)
.9
1.1
2.25
G. South PasadenaFillmore
H. FillmoreDel Mar
I. Del MarMemorial Park
mi
m
time
speed
mi
m
time
speed
mi
m
time
speed
(s)
(m/s)
(s)
(m/s)
(s)
(m/s)
1.39
.59
.46
J. Memorial ParkLake
K. Lake  Allen
L. Allen to Sierra Madre Villa
mi
m
time
speed
mi
m
time
speed
mi
m
time
speed
(s)
(m/s)
(s)
(m/s)
(s)
(m/s)
1
1.14
1.98
1. Where does metro gold line reach its top average speed?___________________
2. Assume that the metro reaches its top average speed at the halfway point of each trip. What is the
metro’s acceleration from the starting station to the halfway point for each of the trips above?
A. ____
B. ____
C.____
D.____
E.____
F.____
G.____
H.____
I.____
J.____
K.____
L ____
Eaton Canyon Section:
Directions:
Measure the height of the bridge and one other object in the park by using similar triangles. Use your string and
the shadow measurement method. Remember that A’/B’ = A/B.
A’
A
A’
A= _____
B
B=_____
B’
A’= _____
B’=_____
4. Object 2:_______ A= _____
B=_____
A’= _____
B’=_____
3. Object 1: Bridge
Directions:
Choose three more objects you would like to calculate the height of. Use your inclinometer and trigonometry
functions to solve for the following problems.
5. Object 1: Bridge
a. Distance from object______________________
b. Angle of View___________________________
c. Height of Object_________________________
Show your work:
6. Object 1: Waterfall
d. Distance from object______________________
e. Angle of View___________________________
f. Height of Object_________________________
Show your work:
7. Object 1: ____________________
g. Distance from object______________________
h. Angle of View___________________________
i. Height of Object_________________________
Show your work:
Directions:
Try to estimate the height of the objects using the kinematics equation for distance.
d=1/2at2 (Remember that the acceleration of gravity is approximately 10m/s/s when neglecting air
resistance)
Assume that the initial vertical velocity of the water at the top of the falls is zero. Watch a drop of water from
the top to the bottom and record the time it took.
8. Height of waterfall=_____________________________________
Show your work:
Make sure that you have a partner clear the area before trying these ones! Drop a small rock from the top of the
bridge and check dam and time the fall.
9. Height of bridge=________________________________________
Show your work:
10. Height of check dam=______________________________________
Show your work:
Conclusion: Did your bridge measurements vary? What form of measurement do you think was most accurate?