Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 620 · 40 questions

What you do (Only the length matters): 1. Tie the nut to the string and hang it from the taped pencil, 30 cm long. 2. Pull it a little to one side and let go — do not push. 3. Time 10 swings and divide by 10. 4. Change only the string length (60 cm), time 10 swings again, and stand back from the bob.

1. 1.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we change it (b) we measure it (c) we keep it the same
2. 2.True or false: a string is not needed for the pendulum. (a) False (b) True
3. 3.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is the one thing we change. (a) True (b) False
4. 4.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a ruler (c) a magnet (d) a balloon
5. 5.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) how far we pull it back (b) the weight of the bob (c) time for 10 swings (d) the string length
6. 6.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we measure it (b) we change it (c) we keep it the same
7. 7.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) it is magnetic (c) the bob could hit you (d) it is hot
8. 8.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a string (c) yeast (d) a ruler
9. 9.🧺 Which of these is needed for the pendulum? (a) yeast (b) a magnet (c) a string (d) a mirror
10. 10.🕰️ Does a heavier bob change the swing time? (a) no, hardly at all (b) yes, much faster (c) it stops swinging (d) yes, much slower
11. 11.True or false: a balloon is not needed for the pendulum. (a) False (b) True
12. 12.True or false: a balloon is needed for the pendulum. (a) True (b) False
13. 13.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) time for 10 swings (b) the string length (c) how far we pull it back
14. 14.True or false: a string is needed for the pendulum. (a) False (b) True
15. 15.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we change it (b) we measure it (c) we keep it the same
16. 16.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a magnet (c) a stopwatch (d) a string
17. 17.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) about the same (b) much faster (c) it cannot swing (d) much slower
18. 18.🧺 Which of these is not needed for the pendulum? (a) a mirror (b) a heavy nut or washer (c) a stopwatch (d) a ruler
19. 19.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
20. 20.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) yeast (c) a heavy nut or washer (d) a ruler
21. 21.True or false: a mirror is not needed for the pendulum. (a) False (b) True
22. 22.True or false: yeast is needed for the pendulum. (a) False (b) True
23. 23.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a heavy brick (c) a small nut or washer (d) a glass bottle
24. 24.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it stays the same (c) it doubles (d) it halves
25. 25.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we change it (b) we measure it (c) we keep it the same
26. 26.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) False (b) True
27. 27.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
28. 28.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) time for 10 swings (b) the weight of the bob (c) the string length
29. 29.True or false: a heavy nut or washer is needed for the pendulum. (a) True (b) False
30. 30.True or false: a heavy nut or washer is not needed for the pendulum. (a) False (b) True
31. 31.🧺 Which of these is needed for the pendulum? (a) a balloon (b) turmeric powder (c) a mirror (d) a heavy nut or washer
32. 32.🧺 Which of these is needed for the pendulum? (a) a pencil and tape (b) yeast (c) turmeric powder (d) a magnet
33. 33.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is what we measure. (a) True (b) False
34. 34.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) it is more accurate (c) 10 is a lucky number (d) it is more fun
35. 35.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “how far we pull it back”? (a) we change it (b) we measure it (c) we keep it the same
36. 36.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is the one thing we change. (a) True (b) False
37. 37.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is kept the same. (a) True (b) False
38. 38.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 14 seconds?
39. 39.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 6 seconds?
40. 40.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) False (b) True

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