Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 451 · 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? True or false: time for 10 swings is what we measure. (a) True (b) False
2. 2.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) slower (c) heavier (d) quicker
3. 3.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
4. 4.🧺 Which of these is needed for the pendulum? (a) a string (b) a balloon (c) a magnet (d) turmeric powder
5. 5.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a pencil and tape (c) a string (d) yeast
6. 6.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a string (c) a heavy nut or washer (d) a balloon
7. 7.⚖️ 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 same hook (c) the string length
8. 8.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) turmeric powder (c) a ruler (d) a string
9. 9.True or false: turmeric powder is not needed for the pendulum. (a) False (b) True
10. 10.⚖️ 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) False (b) True
11. 11.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) True (b) False
12. 12.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a sharp tool (c) a glass bottle (d) a small nut or washer
13. 13.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) no, hardly at all (c) it stops swinging (d) yes, much slower
14. 14.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) the bob could hit you (c) it is wet (d) it is magnetic
15. 15.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
16. 16.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a heavier bob (c) a shorter string (d) a longer string
17. 17.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) time for 10 swings (b) the weight of the bob (c) the string length (d) how far we pull it back
18. 18.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) much faster (c) about the same (d) much slower
19. 19.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a mirror (c) a heavy nut or washer (d) yeast
20. 20.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
21. 21.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we keep it the same (b) we measure it (c) we change it
22. 22.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 18 seconds?
23. 23.True or false: yeast is not needed for the pendulum. (a) False (b) True
24. 24.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
25. 25.True or false: a mirror is not needed for the pendulum. (a) False (b) True
26. 26.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) True (b) False
27. 27.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
28. 28.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
29. 29.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 5 seconds?
30. 30.⚖️ 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 measure it (b) we change it (c) we keep it the same
31. 31.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more accurate (b) it is more fun (c) one swing is too slow (d) 10 is a lucky number
32. 32.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
33. 33.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a battery cell (c) a mirror (d) a pencil and tape
34. 34.True or false: a pencil and tape is not needed for the pendulum. (a) False (b) True
35. 35.True or false: a battery cell is needed for the pendulum. (a) True (b) False
36. 36.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) yeast (b) a ruler (c) a pencil and tape (d) a stopwatch
37. 37.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) how far we pull it back (b) the weight of the bob (c) time for 10 swings (d) the same hook
38. 38.True or false: a mirror is needed for the pendulum. (a) True (b) False
39. 39.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 20 seconds?
40. 40.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we measure it (b) we change it (c) we keep it the same

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