Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 146 · 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.⚖️ 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
2. 2.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a stopwatch (c) a heavy nut or washer (d) a mirror
3. 3.⚖️ 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 weight of the bob
4. 4.⚖️ 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
5. 5.🔮 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
6. 6.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the weight of the bob (b) how far we pull it back (c) the string length (d) time for 10 swings
7. 7.True or false: a stopwatch is needed for the pendulum. (a) False (b) True
8. 8.🧺 Which of these is needed for the pendulum? (a) a stopwatch (b) a magnet (c) a balloon (d) turmeric powder
9. 9.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) the bob could hit you (c) it is magnetic (d) it is wet
10. 10.⚖️ 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) False (b) True
11. 11.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
12. 12.True or false: a pencil and tape is needed for the pendulum. (a) False (b) True
13. 13.True or false: a ruler is needed for the pendulum. (a) False (b) True
14. 14.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a longer string (c) a heavier bob (d) a lighter bob
15. 15.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
16. 16.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
17. 17.⚖️ 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
18. 18.True or false: yeast is needed for the pendulum. (a) False (b) True
19. 19.⚖️ 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
20. 20.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a magnet (c) a string (d) a battery cell
21. 21.True or false: a mirror is not needed for the pendulum. (a) False (b) True
22. 22.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a mirror (c) a pencil and tape (d) a ruler
23. 23.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a heavy nut or washer (c) turmeric powder (d) a ruler
24. 24.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a mirror (c) a ruler (d) turmeric powder
25. 25.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a pencil and tape (c) turmeric powder (d) yeast
26. 26.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
27. 27.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) quicker (c) slower (d) heavier
28. 28.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 32 seconds?
29. 29.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
30. 30.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it halves (c) it becomes 4 times (d) it doubles
31. 31.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we keep it the same (b) we measure it (c) we change it
32. 32.⚖️ 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 measure it (c) we keep it the same
33. 33.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) how far we pull it back (b) the string length (c) time for 10 swings
34. 34.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a battery cell (b) a ruler (c) a pencil and tape (d) a stopwatch
35. 35.True or false: a ruler is not needed for the pendulum. (a) False (b) True
36. 36.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
37. 37.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
38. 38.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
39. 39.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more accurate (b) it is more fun (c) 10 is a lucky number (d) one swing is too slow
40. 40.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the same hook (b) time for 10 swings (c) the string length

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