Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 554 · 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.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it doubles (c) it halves (d) it stays the same
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) the weight of the bob (c) time for 10 swings (d) the same hook
3. 3.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is hot (c) it is magnetic (d) it is wet
4. 4.⚖️ 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
5. 5.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a ruler (c) a stopwatch (d) a battery cell
6. 6.⚖️ 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 string length (c) the same hook
7. 7.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a sharp tool (c) a small nut or washer (d) a heavy brick
8. 8.⚖️ 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
9. 9.⚖️ 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) True (b) False
10. 10.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
11. 11.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 40 seconds?
12. 12.⚖️ 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 change it (c) we keep it the same
13. 13.True or false: a magnet is not needed for the pendulum. (a) False (b) True
14. 14.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a ruler (c) a magnet (d) a pencil and tape
15. 15.⚖️ 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
16. 16.True or false: a mirror is not needed for the pendulum. (a) True (b) False
17. 17.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 27 seconds?
18. 18.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
19. 19.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a pencil and tape (c) a stopwatch (d) a ruler
20. 20.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the weight of the bob (b) the string length (c) time for 10 swings (d) how far we pull it back
21. 21.⚖️ 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
22. 22.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a mirror (c) a heavy nut or washer (d) turmeric powder
23. 23.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
24. 24.True or false: a string is needed for the pendulum. (a) True (b) False
25. 25.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
26. 26.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
27. 27.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) stopped (c) heavier (d) quicker
28. 28.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
29. 29.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
30. 30.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) about the same (c) much faster (d) it cannot swing
31. 31.⚖️ 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
32. 32.⚖️ 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 keep it the same (c) we measure it
33. 33.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
34. 34.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) yes, much slower (c) no, hardly at all (d) it stops swinging
35. 35.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 54 seconds?
36. 36.🧺 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) a magnet
37. 37.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
38. 38.⚖️ 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
39. 39.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a pencil and tape (c) a battery cell (d) a string
40. 40.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a ruler (c) a string (d) turmeric powder

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