Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 359 · 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.🧺 Which of these is needed for the pendulum? (a) a string (b) a balloon (c) a mirror (d) yeast
2. 2.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a balloon (c) a magnet (d) a pencil and tape
3. 3.⚖️ 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
4. 4.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) yes, much faster (c) yes, much slower (d) no, hardly at all
5. 5.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a digital watch (c) a grandfather clock (d) a phone
6. 6.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is the one thing we change. (a) False (b) True
7. 7.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
8. 8.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a lighter bob (c) a longer string (d) a shorter string
9. 9.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
10. 10.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) False (b) True
11. 11.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a mirror (c) a string (d) a pencil and tape
12. 12.⚖️ 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 keep it the same (c) we change it
13. 13.🛟 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
14. 14.True or false: a battery cell is needed for the pendulum. (a) False (b) True
15. 15.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False
16. 16.True or false: a balloon is not needed for the pendulum. (a) True (b) False
17. 17.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it halves (c) it becomes 4 times (d) it stays the same
18. 18.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
19. 19.🕰️ 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) it is more fun (d) 10 is a lucky number
20. 20.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is what we measure. (a) True (b) False
21. 21.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a stopwatch (c) a string (d) a heavy nut or washer
22. 22.🧺 Which of these is not needed for the pendulum? (a) a string (b) a pencil and tape (c) turmeric powder (d) a heavy nut or washer
23. 23.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the same hook (b) the weight of the bob (c) how far we pull it back (d) time for 10 swings
24. 24.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a balloon (c) a heavy nut or washer (d) a mirror
25. 25.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a ruler (c) yeast (d) a pencil and tape
26. 26.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we change it (b) we keep it the same (c) we measure it
27. 27.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) about the same (c) it cannot swing (d) much faster
28. 28.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the string length (b) the weight of the bob (c) how far we pull it back (d) time for 10 swings
29. 29.True or false: a ruler is not needed for the pendulum. (a) True (b) False
30. 30.⚖️ 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
31. 31.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) the bob could hit you (c) it is magnetic (d) it is hot
32. 32.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
33. 33.🧺 Which of these is needed for the pendulum? (a) a magnet (b) yeast (c) a mirror (d) a stopwatch
34. 34.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) stopped (c) heavier (d) quicker
35. 35.True or false: a battery cell is not needed for the pendulum. (a) True (b) False
36. 36.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
37. 37.True or false: a string is needed for the pendulum. (a) False (b) True
38. 38.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a mirror (b) a heavy nut or washer (c) a stopwatch (d) a pencil and tape
39. 39.⚖️ 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
40. 40.True or false: turmeric powder is not needed for the pendulum. (a) False (b) True

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