Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 271 · 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 1 second for one swing. How many swings does it make in 13 seconds?
2. 2.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is wet (c) it is hot (d) the bob could hit you
3. 3.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) it stops swinging (c) yes, much faster (d) no, hardly at all
4. 4.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
5. 5.⚖️ 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
6. 6.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) turmeric powder (b) a heavy nut or washer (c) a pencil and tape (d) a string
7. 7.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
8. 8.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it halves (c) it doubles (d) it stays the same
9. 9.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
10. 10.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a digital watch (c) a sundial (d) a grandfather clock
11. 11.🧺 Which of these is needed for the pendulum? (a) yeast (b) a string (c) a mirror (d) turmeric powder
12. 12.⚖️ 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
13. 13.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a lighter bob (c) a shorter string (d) a longer string
14. 14.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) stopped (c) quicker (d) slower
15. 15.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 39 seconds?
16. 16.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
17. 17.⚖️ 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
18. 18.True or false: a magnet is not needed for the pendulum. (a) True (b) False
19. 19.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a string (c) a ruler (d) a magnet
20. 20.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
21. 21.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a ruler (c) a magnet (d) a mirror
22. 22.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the string length (b) time for 10 swings (c) the weight of the bob (d) the same hook
23. 23.⚖️ 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) False (b) True
24. 24.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) how far we pull it back (c) the weight of the bob (d) time for 10 swings
25. 25.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
26. 26.True or false: a string is not needed for the pendulum. (a) False (b) True
27. 27.⚖️ 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) True (b) False
28. 28.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
29. 29.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a pencil and tape (c) a string (d) a balloon
30. 30.🧺 Which of these is needed for the pendulum? (a) a mirror (b) yeast (c) a battery cell (d) a stopwatch
31. 31.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a stopwatch (c) a battery cell (d) a pencil and tape
32. 32.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 8 seconds?
33. 33.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) much faster (c) about the same (d) much slower
34. 34.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is kept the same. (a) False (b) True
35. 35.True or false: a battery cell is needed for the pendulum. (a) False (b) True
36. 36.⚖️ 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
37. 37.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a battery cell (c) a pencil and tape (d) a string
38. 38.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
39. 39.⚖️ 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
40. 40.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 38 seconds?

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