Trade Magazines Newspapers magazines and blogs pop s cience A1 Meterstick Measurements Using the geometry of the sun Eratosthenes measured the radius of the earth c 250 BC ID: 643364
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Slide1
AME20216 - Lab I
A2 –
Galileo’s Inclined PlaneSlide2
A1 –
Meterstick Measurements
Meter sticks can be used in unexpected ways.
f
luid velocity
and
pressureSlide3
Gravity
Galileo
Galilei
1564 - 1642
Inclined Plane
Apollo 15 Feather vs. HammerSlide4
A2 – Galileo’s Inclined Plane
Galileo empirically found that
x
θSlide5
Interpreting Data
Sir Isaac Newton 1642 - 1747
According to Newtonian physics for a ball rolling down an inclined plane:Slide6
A2 – Galileo’s Inclined Plane
Measure time
t
to roll distance
x.Slide7
A2 – Galileo’s Inclined PlaneSlide8
A2 – Extrapolating
gSlide9
A2 – Using “fit()” command
θ
= 8.1°
Uncertainty in
p1
0.5324 m/s
2
0.5114
m/s
2
0.4904
m/s
2
Uncertainty in
g
10.6320 m/s
2
10.2121
m/s
2
9.7933
m/s
2
g
= 10.2 ± 0.4 m/s
2