Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 937 · 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: how far we pull it back is kept the same. (a) False (b) True
2. 2.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) no, hardly at all (c) yes, much faster (d) yes, much slower
3. 3.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
4. 4.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a pencil and tape (c) a heavy nut or washer (d) yeast
5. 5.⚖️ 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 keep it the same (c) we change it
6. 6.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a sundial (c) a phone (d) a digital watch
7. 7.True or false: a mirror is needed for the pendulum. (a) True (b) False
8. 8.⚖️ 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
9. 9.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is hot (c) the bob could hit you (d) it is wet
10. 10.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
11. 11.True or false: a string is not needed for the pendulum. (a) True (b) False
12. 12.⚖️ 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 keep it the same (c) we measure it
13. 13.⚖️ 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 same hook (d) the weight of the bob
14. 14.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a shorter string (c) a heavier bob (d) a lighter bob
15. 15.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) a magnet (d) a pencil and tape
16. 16.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a pencil and tape (c) a stopwatch (d) a balloon
17. 17.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
18. 18.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) how far we pull it back (b) the weight of the bob (c) the string length (d) time for 10 swings
19. 19.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a magnet (c) a string (d) a ruler
20. 20.True or false: a mirror is not needed for the pendulum. (a) False (b) True
21. 21.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we measure it (b) we keep it the same (c) we change it
22. 22.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
23. 23.🕰️ 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
24. 24.True or false: a ruler is not needed for the pendulum. (a) False (b) True
25. 25.True or false: a magnet is not needed for the pendulum. (a) False (b) True
26. 26.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
27. 27.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
28. 28.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a mirror (c) yeast (d) a heavy nut or washer
29. 29.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) much slower (c) about the same (d) much faster
30. 30.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the same hook (b) the string length (c) time for 10 swings
31. 31.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
32. 32.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a ruler (c) a balloon (d) a magnet
33. 33.⚖️ 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
34. 34.True or false: a battery cell is needed for the pendulum. (a) False (b) True
35. 35.True or false: turmeric powder is not needed for the pendulum. (a) False (b) True
36. 36.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) slower (c) quicker (d) stopped
37. 37.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a string (c) a battery cell (d) a mirror
38. 38.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a battery cell (c) a ruler (d) a heavy nut or washer
39. 39.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
40. 40.⚖️ 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

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