experiment

Individual cycles for ball rolling inside of plastic container.

.60s

.68

.67

.56

.66

.64

.58

.65

.62

.60

.64

.67

.61

.59

The periods of oscillation appear to reamin constant, but that could be a result of the timing method." "Water in a glass tube.

47""

water column. mean 1.24s

mean deviation .064s

32"" column mean osc. 1.20s dev. .057s

26"" column mean osc. 1.18s dev. .086s

It appears that the ave. time of oscillation decreases as the mass of water decreases" "ball in a glass bowl.

the period tends to be independant of amplitude. " "" "" "" "" "" "" ""

Amplitude measurements for ball in glass bowl. From center equilibrium.

X Y

96mm 44mm

83mm 33mm

79mm 25mm

71.5mm 23mm

66mm 19mm

60mm 16mm

56mm 14mm

Measurements after this point became difficult because of the small change in amplitude

" "Amplitude measurements for ball in glass tube. From equilibrium position.

x y

56mm 54mm

36mm 32.5mm

23mm 21mm

16mm 14mm

12.5mm 10.5mm

8.5mm 7mm

4mm 4mm

2mm 2mm

Good. If you graph amplitude vs. clock time, assuming that clock times progress according to your previous measurements (in most cases being at pretty regular intervals), does the graph you get for the glass bowl have the same basic shape as the graph you get for the glass tube? How does this compare with the shape of the graph of amplitude vs. clock time for a pendulum?