**1. Fashion a pendulum by
attaching a string to a cluster of large washers. Measure the
mass of the washers.**

**2. Attach the pendulum to a point of
suspension. Measure the length of the pendulum (point of suspension
to center of mass).**

**3. Measure the period (the time for one
cycle) of the pendulum.**

**4. Now, in cooperation with a neighboring
group, fashion two identical pendulums (same mass, same length).
Start them with the same initial displacement; what do you notice
about the periods? Start them with different initial displacement;
what do you notice about the periods? What do you conclude about
the relationship between period and initial displacement?**

**5. Now change the mass of one of the
pendulums. Be sure that the lengths are the same (point of suspension
to center of mass). Start them with the same initial displacement;
what do you notice about the periods? What do you conclude about
the relationship between period and mass.?**

**6. Now change the length of one of the
pendulums Start them with the same initial displacement; what
do you notice about the periods? What do you conclude about the
relationship between period and pendulum length?**

**7. Use your pendulum to count how many
cycles it makes in 30 seconds. The instructor will say 3-2-1-
go. Start your pendulum on "go" call out "time"
when you think 30 seconds has elapsed.**

**8. Direct your attention to the front
board where you will find a time scale. Remove your pendulum from
its suspension point and place it on the time line so that the
attachment point on the string intersects the timeline at the
period of the pendulum. Now look at the shape of the curve made
by the masses. Please comment.**

**9.Last edited 01/01/06**

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