Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 23 · 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 sharp tool (b) a glass bottle (c) a heavy brick (d) a small nut or washer
2. 2.⚖️ 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) time for 10 swings (c) the weight of the bob (d) the string length
3. 3.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a string (c) a ruler (d) a magnet
4. 4.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is wet (c) the bob could hit you (d) it is hot
5. 5.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a string (c) a heavy nut or washer (d) yeast
6. 6.True or false: yeast is needed for the pendulum. (a) False (b) True
7. 7.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is kept the same. (a) True (b) False
8. 8.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a longer string (c) a lighter bob (d) a heavier bob
9. 9.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
10. 10.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) about the same (c) it cannot swing (d) much slower
11. 11.⚖️ 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
12. 12.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a grandfather clock (c) a phone (d) a digital watch
13. 13.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
14. 14.⚖️ 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
15. 15.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
16. 16.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
17. 17.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 11 seconds?
18. 18.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) the same hook (c) time for 10 swings
19. 19.⚖️ 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
20. 20.True or false: a battery cell is not needed for the pendulum. (a) False (b) True
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 change it (c) we measure it
22. 22.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) slower (c) quicker (d) heavier
23. 23.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 15 seconds?
24. 24.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 51 seconds?
25. 25.⚖️ 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
26. 26.⚖️ 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
27. 27.🧺 Which of these is needed for the pendulum? (a) yeast (b) a ruler (c) a magnet (d) a battery cell
28. 28.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a stopwatch (c) a magnet (d) a string
29. 29.⚖️ 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
30. 30.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 30 seconds?
31. 31.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
32. 32.⚖️ 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
33. 33.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) True (b) False
34. 34.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a balloon (c) a heavy nut or washer (d) a string
35. 35.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it doubles (c) it becomes 4 times (d) it halves
36. 36.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
37. 37.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a string (c) a stopwatch (d) turmeric powder
38. 38.⚖️ 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
39. 39.True or false: a heavy nut or washer is needed for the pendulum. (a) True (b) False
40. 40.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) turmeric powder (c) a string (d) a stopwatch

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