Pendulum swing
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Transcript of Pendulum swing
By: Sophie Dunn
PENDULUM SWING
PROBLEM
Does the weight of a pendulum affect the number of swings it completes in 2 minutes?
HYPOTHESIS
If the weight is heavier then it will complete more swings in 2 minutes
MATERIALS
8.8 kg weight
4.4 kg weight
Chalk
Rope(154 inches)
Measuring tool/extendable ruler
Timer(on iPod)
Counter
MATERIALS CONT.
PROCEDURE
1. Gather materials
2. Hang rope from tree
3. Put 4.4 kg weight on rope
4. Pull back to swing line and release
5. Count number of swings in 2 minutes
6. Record data and repeat two more times (3 trials total)
7. Take off 4.4 kg weight and attach 8.8 kg weight
8. Follow steps 4 through 6
VARIABLES
CONSTANT VARIABLES- The 2 minute swing time, length of rope, and how far pulled back
INDEPENDENT VARIABLE- The 2 different weights
DEPENDENT VARIABLE- The number of swings
RESULTS
Trial Weight (kg) Swings
1 4.4 62
2 4.4 62
3 4.4 61
1 8.8 62
2 8.8 61
3 8.8 60
10s 1s
6 2,2,1,2,1,0
GRAPH
1 2 30
10
20
30
40
50
60
70
80
Comparison of Pendulum Different Weights number of swings in 2 minutes on a 154 inch rope
4.4 kg Weight8.8 kg Weight
Trial Number
Num
ber o
f Sw
ings
in 2
Min
utes
CONCLUSION
Does the weight of a pendulum effect the number of swings it completes in 2 minutes? A weight with a greater mass requires more of a push from gravity to accelerate. So being big balances itself out. The weights fall/swing at the same rate because the acceleration due to gravity is the same for both. My hypothesis is wrong. I predicted that the bigger weight would swing more, but they complete about the same number of swings.
THE PENDULUM
THE PENDULUM CONT.
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THE END
PENDULUMS!!