Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 758 · 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 old clock uses a pendulum to keep time? (a) a digital watch (b) a grandfather clock (c) a sundial (d) a phone
2. 2.⚖️ 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
3. 3.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 12 seconds?
4. 4.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
5. 5.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
6. 6.True or false: a stopwatch is not needed for the pendulum. (a) False (b) True
7. 7.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 39 seconds?
8. 8.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) it is more fun (c) it is more accurate (d) 10 is a lucky number
9. 9.⚖️ 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
10. 10.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a glass bottle (c) a heavy brick (d) a sharp tool
11. 11.🧺 Which of these is needed for the pendulum? (a) a string (b) a mirror (c) turmeric powder (d) a battery cell
12. 12.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) it stops swinging (c) no, hardly at all (d) yes, much faster
13. 13.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a balloon (c) a stopwatch (d) a pencil and tape
14. 14.⚖️ 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
15. 15.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
16. 16.⚖️ 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
17. 17.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a pencil and tape (c) a magnet (d) a battery cell
18. 18.True or false: a ruler is not needed for the pendulum. (a) False (b) True
19. 19.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False
20. 20.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) False (b) True
21. 21.🛟 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
22. 22.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a string (c) turmeric powder (d) a stopwatch
23. 23.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we measure it (b) we keep it the same (c) we change it
24. 24.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a heavy nut or washer (c) yeast (d) a string
25. 25.⚖️ 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
26. 26.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it halves (c) it becomes 4 times (d) it doubles
27. 27.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) turmeric powder (c) a pencil and tape (d) a heavy nut or washer
28. 28.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
29. 29.🧺 Which of these is needed for the pendulum? (a) yeast (b) turmeric powder (c) a heavy nut or washer (d) a magnet
30. 30.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we keep it the same (b) we measure it (c) we change it
31. 31.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a battery cell (b) a pencil and tape (c) a stopwatch (d) a heavy nut or washer
32. 32.🧺 Which of these is not needed for the pendulum? (a) a battery cell (b) a string (c) a pencil and tape (d) a ruler
33. 33.⚖️ 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) True (b) False
34. 34.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
35. 35.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a lighter bob (c) a longer string (d) a shorter string
36. 36.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) much slower (c) about the same (d) it cannot swing
37. 37.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
38. 38.⚖️ 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) how far we pull it back (c) the same hook (d) the string length
39. 39.True or false: a pencil and tape is needed for the pendulum. (a) False (b) True
40. 40.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the weight of the bob (b) the string length (c) time for 10 swings

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