Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 57 · 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? True or false: time for 10 swings is what we measure. (a) False (b) True
2. 2.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
3. 3.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 51 seconds?
4. 4.True or false: a magnet is not needed for the pendulum. (a) True (b) False
5. 5.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a heavier bob (c) a longer string (d) a lighter bob
6. 6.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
7. 7.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
8. 8.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
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? Which of these is kept the same? (a) time for 10 swings (b) the string length (c) the weight of the bob
11. 11.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
12. 12.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a stopwatch (c) a battery cell (d) a heavy nut or washer
13. 13.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
14. 14.⚖️ 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) how far we pull it back
15. 15.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a heavy nut or washer (c) a magnet (d) a string
16. 16.True or false: a string is not needed for the pendulum. (a) True (b) False
17. 17.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it doubles (c) it becomes 4 times (d) it stays the same
18. 18.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) heavier (c) quicker (d) stopped
19. 19.True or false: a heavy nut or washer is not needed for the pendulum. (a) False (b) True
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.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we measure it (b) we change it (c) we keep it the same
22. 22.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) False (b) True
23. 23.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a mirror (c) a string (d) a heavy nut or washer
24. 24.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is the one thing we change. (a) False (b) True
25. 25.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
26. 26.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
27. 27.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a ruler (c) a stopwatch (d) a mirror
28. 28.🧺 Which of these is not needed for the pendulum? (a) a string (b) a heavy nut or washer (c) a stopwatch (d) yeast
29. 29.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we measure it (b) we keep it the same (c) we change it
30. 30.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 12 seconds?
31. 31.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a magnet (c) a stopwatch (d) turmeric powder
32. 32.🔮 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
33. 33.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
34. 34.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False
35. 35.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a ruler (c) a string (d) a balloon
36. 36.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) True (b) False
37. 37.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
38. 38.True or false: a balloon is needed for the pendulum. (a) False (b) True
39. 39.⚖️ 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 weight of the bob (d) the same hook
40. 40.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a digital watch (c) a grandfather clock (d) a sundial

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