Pendulum swing

1. By: Sophie Dunn Pendulum Swing

2. Problem Does the weight of a pendulum affect the number of swings it completes in 2 minutes?

3. Hypothesis If the weight is heavier then it will complete more swings in 2 minutes

4. Materials 8.8 kg weight 4.4 kg weight Chalk Rope(154 inches) Measuring tool/extendable ruler Timer(on iPod) Counter

5. Materials Cont.

6. 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

7. 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

8. 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

9. Graph

10. 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.

11. The Pendulum

12. The Pendulum Cont.

13. The Pendulum Cont.

14. The Pendulum Cont.

15. The Pendulum cont.

16. The End PENDULUMS!! 