Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 246 · 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 takes 3 seconds for one swing. How many swings does it make in 33 seconds?
2. 2.⚖️ 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
3. 3.🧺 Which of these is not needed for the pendulum? (a) a balloon (b) a pencil and tape (c) a stopwatch (d) a heavy nut or washer
4. 4.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a digital watch (c) a grandfather clock (d) a phone
5. 5.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a mirror (c) a stopwatch (d) a battery cell
6. 6.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we change it (b) we measure it (c) we keep it the same
7. 7.⚖️ 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
8. 8.True or false: a ruler is needed for the pendulum. (a) False (b) True
9. 9.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) yeast (c) a ruler (d) a balloon
10. 10.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) much slower (c) it cannot swing (d) about the same
11. 11.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a heavy brick (c) a small nut or washer (d) a sharp tool
12. 12.⚖️ 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) True (b) False
13. 13.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a stopwatch (c) yeast (d) a heavy nut or washer
14. 14.⚖️ 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
15. 15.True or false: a ruler is not needed for the pendulum. (a) True (b) False
16. 16.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a magnet (c) a mirror (d) a string
17. 17.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) stopped (c) slower (d) quicker
18. 18.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) 10 is a lucky number (b) one swing is too slow (c) it is more fun (d) it is more accurate
19. 19.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
20. 20.⚖️ 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) True (b) False
21. 21.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
22. 22.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
23. 23.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
24. 24.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
25. 25.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a magnet (c) a ruler (d) a heavy nut or washer
26. 26.⚖️ 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
27. 27.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a mirror (c) a heavy nut or washer (d) a ruler
28. 28.⚖️ 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
29. 29.⚖️ 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 change it (c) we keep it the same
30. 30.⚖️ 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 weight of the bob (c) the string length
31. 31.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
32. 32.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a balloon (c) a pencil and tape (d) a battery cell
33. 33.True or false: a string is not needed for the pendulum. (a) False (b) True
34. 34.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a mirror (c) a battery cell (d) a heavy nut or washer
35. 35.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a longer string (c) a heavier bob (d) a lighter bob
36. 36.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) a battery cell (d) a pencil and tape
37. 37.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
38. 38.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) False (b) True
39. 39.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a stopwatch (c) a ruler (d) a mirror
40. 40.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) time for 10 swings (b) the string length (c) the same hook (d) how far we pull it back

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