Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 302 · 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.🕰️ 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
2. 2.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a string (c) a heavy nut or washer (d) turmeric powder
3. 3.True or false: a ruler is not needed for the pendulum. (a) True (b) False
4. 4.True or false: a balloon is not needed for the pendulum. (a) True (b) False
5. 5.⚖️ 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
6. 6.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) yes, much slower (c) yes, much faster (d) no, hardly at all
7. 7.⚖️ 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) time for 10 swings (c) the string length
8. 8.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) the bob could hit you (c) it is hot (d) it is magnetic
9. 9.⚖️ 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 keep it the same (b) we change it (c) we measure it
10. 10.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
11. 11.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) about the same (c) much slower (d) much faster
12. 12.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a magnet (c) a stopwatch (d) yeast
13. 13.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 42 seconds?
14. 14.⚖️ 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
15. 15.True or false: a mirror is not needed for the pendulum. (a) False (b) True
16. 16.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 21 seconds?
17. 17.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it stays the same (c) it halves (d) it becomes 4 times
18. 18.⚖️ 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
19. 19.⚖️ 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
20. 20.True or false: turmeric powder is needed for the pendulum. (a) False (b) True
21. 21.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a ruler (c) a pencil and tape (d) a magnet
22. 22.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is what we measure. (a) False (b) True
23. 23.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a pencil and tape (c) a magnet (d) a string
24. 24.True or false: a magnet is not needed for the pendulum. (a) False (b) True
25. 25.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a string (c) a mirror (d) a battery cell
26. 26.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 12 seconds?
27. 27.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) time for 10 swings (c) the weight of the bob (d) the same hook
28. 28.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a stopwatch (c) a pencil and tape (d) turmeric powder
29. 29.⚖️ 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
30. 30.📘 What pulls the pendulum bob back down after each swing? (a) magnetism (b) the wind (c) gravity (d) the string
31. 31.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a glass bottle (c) a small nut or washer (d) a heavy brick
32. 32.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
33. 33.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we keep it the same (b) we change it (c) we measure it
34. 34.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
35. 35.⚖️ 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) the same hook (c) the weight of the bob (d) the string length
36. 36.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 9 seconds?
37. 37.True or false: a string is needed for the pendulum. (a) False (b) True
38. 38.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
39. 39.🧺 Which of these is needed for the pendulum? (a) yeast (b) a ruler (c) a balloon (d) a magnet
40. 40.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed

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