Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 566 · 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.🧺 Which of these is not needed for the pendulum? (a) a string (b) a heavy nut or washer (c) yeast (d) a stopwatch
2. 2.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
3. 3.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a longer string (c) a heavier bob (d) a lighter bob
4. 4.🧺 Do we need a ruler 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.⚖️ 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) False (b) True
7. 7.⚖️ 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 weight of the bob (c) the string length
8. 8.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
9. 9.True or false: a ruler is needed for the pendulum. (a) True (b) False
10. 10.🔮 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
11. 11.True or false: a magnet is not needed for the pendulum. (a) False (b) True
12. 12.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
13. 13.True or false: turmeric powder is needed for the pendulum. (a) False (b) True
14. 14.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) it cannot swing (c) much faster (d) about the same
15. 15.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
16. 16.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) the weight of the bob (c) how far we pull it back (d) time for 10 swings
17. 17.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) it is more fun (c) it is more accurate (d) 10 is a lucky number
18. 18.True or false: a mirror is not needed for the pendulum. (a) False (b) True
19. 19.🛟 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
20. 20.True or false: a string is not needed for the pendulum. (a) False (b) True
21. 21.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a grandfather clock (c) a phone (d) a digital watch
22. 22.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 45 seconds?
23. 23.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a string (c) a ruler (d) a magnet
24. 24.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a mirror (c) a heavy nut or washer (d) a battery cell
25. 25.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we change it (b) we measure it (c) we keep it the same
26. 26.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the same hook (b) the weight of the bob (c) time for 10 swings (d) the string length
27. 27.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a pencil and tape (c) turmeric powder (d) a ruler
28. 28.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a magnet (c) a heavy nut or washer (d) a pencil and tape
29. 29.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
30. 30.⚖️ 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 measure it (c) we change it
31. 31.True or false: a stopwatch is needed for the pendulum. (a) True (b) False
32. 32.True or false: a heavy nut or washer is 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 “time for 10 swings”? (a) we keep it the same (b) we change it (c) we measure it
34. 34.True or false: a string is 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 string (b) a heavy nut or washer (c) a ruler (d) turmeric powder
36. 36.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) False (b) True
37. 37.🕰️ 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
38. 38.True or false: a mirror is needed for the pendulum. (a) False (b) True
39. 39.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a string (c) a mirror (d) a heavy nut or washer
40. 40.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?

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