Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 55 · 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.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it doubles (c) it halves (d) it stays the same
2. 2.⚖️ 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 measure it (c) we change it
3. 3.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 16 seconds?
4. 4.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 14 seconds?
5. 5.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
6. 6.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) 10 is a lucky number (c) one swing is too slow (d) it is more accurate
7. 7.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) the bob could hit you (c) it is wet (d) it is magnetic
8. 8.⚖️ 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) True (b) False
9. 9.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
10. 10.⚖️ 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
11. 11.⚖️ 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 change it (c) we keep it the same
12. 12.⚖️ 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
13. 13.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a magnet (c) a stopwatch (d) a balloon
14. 14.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the weight of the bob (b) the same hook (c) how far we pull it back (d) the string length
15. 15.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a string (c) a heavy nut or washer (d) a balloon
16. 16.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) yes, much faster (c) no, hardly at all (d) yes, much slower
17. 17.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a mirror (c) a pencil and tape (d) yeast
18. 18.⚖️ 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
19. 19.True or false: a mirror is not needed for the pendulum. (a) False (b) True
20. 20.🧺 Which of these is not needed for the pendulum? (a) a string (b) a pencil and tape (c) a battery cell (d) a stopwatch
21. 21.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a heavy nut or washer (c) a pencil and tape (d) yeast
22. 22.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
23. 23.⚖️ 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) how far we pull it back
24. 24.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a balloon (c) a ruler (d) a heavy nut or washer
25. 25.True or false: a balloon is needed for the pendulum. (a) False (b) True
26. 26.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
27. 27.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
28. 28.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 60 seconds?
29. 29.⚖️ 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) True (b) False
30. 30.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a heavier bob (c) a longer string (d) a shorter string
31. 31.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) much slower (c) about the same (d) it cannot swing
32. 32.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) slower (c) quicker (d) stopped
33. 33.True or false: turmeric powder is needed for the pendulum. (a) False (b) True
34. 34.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
35. 35.⚖️ 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) True (b) False
36. 36.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a magnet (b) a pencil and tape (c) a string (d) a heavy nut or washer
37. 37.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a heavy nut or washer (c) a ruler (d) a mirror
38. 38.True or false: a string is needed for the pendulum. (a) True (b) False
39. 39.True or false: a magnet is needed for the pendulum. (a) False (b) True
40. 40.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we change it (b) we keep it the same (c) we measure it

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