Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 331 · 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.🛟 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
2. 2.True or false: yeast is not needed for the pendulum. (a) True (b) False
3. 3.True or false: turmeric powder is not needed for the pendulum. (a) False (b) True
4. 4.⚖️ 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) time for 10 swings (d) the string length
5. 5.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
6. 6.🔮 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
7. 7.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
8. 8.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a heavy nut or washer (c) yeast (d) a balloon
9. 9.⚖️ 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) the same hook
10. 10.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 10 seconds?
11. 11.True or false: yeast is needed for the pendulum. (a) True (b) False
12. 12.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a string (c) a stopwatch (d) a balloon
13. 13.🧺 Which of these is needed for the pendulum? (a) a string (b) yeast (c) a magnet (d) turmeric powder
14. 14.⚖️ 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) False (b) True
15. 15.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
16. 16.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) a stopwatch (d) a balloon
17. 17.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is what we measure. (a) False (b) True
18. 18.🕰️ 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
19. 19.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a heavier bob (c) a lighter bob (d) a longer string
20. 20.True or false: a stopwatch is needed for the pendulum. (a) True (b) False
21. 21.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 39 seconds?
22. 22.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
23. 23.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) a heavy nut or washer (d) a battery cell
24. 24.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
25. 25.⚖️ 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
26. 26.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a stopwatch (c) a heavy nut or washer (d) a mirror
27. 27.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is the one thing we change. (a) False (b) True
28. 28.True or false: a stopwatch is not needed for the pendulum. (a) False (b) True
29. 29.True or false: a magnet is needed for the pendulum. (a) False (b) True
30. 30.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is kept the same. (a) False (b) True
31. 31.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) slower (c) stopped (d) quicker
32. 32.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a pencil and tape (c) yeast (d) a heavy nut or washer
33. 33.⚖️ 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
34. 34.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
35. 35.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) it is hot (c) it is magnetic (d) the bob could hit you
36. 36.⚖️ 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
37. 37.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a sundial (c) a grandfather clock (d) a phone
38. 38.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it becomes 4 times (c) it doubles (d) it halves
39. 39.🧺 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 stopwatch
40. 40.⚖️ 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

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