Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 440 · 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.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
2. 2.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) yes, much faster (c) no, hardly at all (d) it stops swinging
3. 3.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
4. 4.⚖️ 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
5. 5.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a ruler (c) a pencil and tape (d) a stopwatch
6. 6.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
7. 7.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is kept the same. (a) True (b) False
8. 8.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a battery cell (c) a pencil and tape (d) a string
9. 9.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
10. 10.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we keep it the same (b) we change it (c) we measure it
11. 11.⚖️ 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
12. 12.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) stopped (c) slower (d) quicker
13. 13.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) yeast (c) a balloon (d) a heavy nut or washer
14. 14.True or false: yeast is needed for the pendulum. (a) False (b) True
15. 15.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a heavy brick (c) a sharp tool (d) a small nut or washer
16. 16.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
17. 17.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
18. 18.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
19. 19.🧺 Which of these is not needed for the pendulum? (a) a string (b) a heavy nut or washer (c) turmeric powder (d) a pencil and tape
20. 20.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) time for 10 swings (c) the weight of the bob
21. 21.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is magnetic (c) it is wet (d) the bob could hit you
22. 22.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
23. 23.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a ruler (c) yeast (d) a heavy nut or washer
24. 24.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a pencil and tape (c) a magnet (d) a string
25. 25.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a string (c) a ruler (d) turmeric powder
26. 26.⚖️ 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) False (b) True
27. 27.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it becomes 4 times (c) it stays the same (d) it halves
28. 28.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) much slower (c) much faster (d) about the same
29. 29.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a mirror (c) a string (d) a magnet
30. 30.⚖️ 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) time for 10 swings (c) the string length (d) the weight of the bob
31. 31.⚖️ 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
32. 32.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a battery cell (c) a pencil and tape (d) yeast
33. 33.🧺 Which of these is needed for the pendulum? (a) a balloon (b) turmeric powder (c) a ruler (d) yeast
34. 34.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a digital watch (c) a grandfather clock (d) a phone
35. 35.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
36. 36.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 33 seconds?
37. 37.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we keep it the same (b) we change it (c) we measure it
38. 38.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) 10 is a lucky number (c) it is more accurate (d) one swing is too slow
39. 39.True or false: a heavy nut or washer is needed for the pendulum. (a) True (b) False
40. 40.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) time for 10 swings (c) how far we pull it back

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