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Unformatted text preview: the force constants, k, of these springs. Our experimental setup will
look like that in Figure 9, with a mass and spring clamped above a photogate. We will use a nearly
identical setup for the simple pendulum in Experiment 2.
1. Hang a 150-gram mass (50-gram gold hanger plus 100-gram slotted mass) from one of your
three springs as shown in Figure 9, so that the mass is suspended just above the photogate
94 Figure 8: A ping-pong ball rolling in the dish used for the ball-dish oscillation experiment. Figure 9: The experimental setup for Experiment 1. We clamp one end of a spring above a
photogate, and attach a known mass to the other end. When the mass is displaced, it breaks the
photogate beam. LoggerPro will then record its period of oscillation. beam when the system is in equilibrium. Note that, because we will be using springs with
different spring constants, you will need to adjust the height of the photogate for each new
spring you try.
2. Set up LoggerPro to record ﬁve periods of the mass’s oscillation. You can do this using the
95 LoggerPro template pendulum.cmbl.
3. Pull down on the hanging mass so that it breaks the photogate beam. Release it and let it
bounce back and forth a few times. You need to make sure that the hanging mass breaks
the photogate beam twice - once on descent and once on ascent - so adjust the hanging mass
horizontally so that just its edge passes through the photogate beam.
4. Take data on ﬁve successive oscillation periods using LoggerPro.
5. Find the mean period of oscillation and convert it into an angular frequency of oscillation, ω .
6. Using your calculated ω and the known mass, m, ﬁnd k, the force constant of the spring.
7. Repeat steps 1-6 for the other two springs in your kit. All should have signiﬁcantly different
Problem 10.11 Your springs are labeled with colors: red, green, and blue.
Rank the springs in order of their spring constants, from smallest to largest.
How could you tell which spring had the l...
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- Spring '11