Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 121 · 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? What do we do with “time for 10 swings”? (a) we keep it the same (b) we change it (c) we measure it
2. 2.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
3. 3.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) much faster (c) it cannot swing (d) about the same
4. 4.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a glass bottle (c) a small nut or washer (d) a sharp tool
5. 5.True or false: yeast is needed for the pendulum. (a) False (b) True
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) True (b) False
7. 7.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) the bob could hit you (c) it is hot (d) it is wet
8. 8.⚖️ 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) True (b) False
9. 9.🧺 Which of these is not needed for the pendulum? (a) a string (b) a ruler (c) a balloon (d) a heavy nut or washer
10. 10.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
11. 11.⚖️ 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
12. 12.⚖️ 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
13. 13.⚖️ 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
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.⚖️ 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) False (b) True
16. 16.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a string (c) a pencil and tape (d) yeast
17. 17.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a balloon (c) a stopwatch (d) yeast
18. 18.⚖️ 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
19. 19.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a string (c) a pencil and tape (d) yeast
20. 20.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a balloon (c) a string (d) a stopwatch
21. 21.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) stopped (c) heavier (d) quicker
22. 22.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 5 seconds?
23. 23.⚖️ 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) how far we pull it back (c) time for 10 swings (d) the string length
24. 24.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 18 seconds?
25. 25.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
26. 26.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a ruler (c) a stopwatch (d) a magnet
27. 27.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it halves (c) it stays the same (d) it becomes 4 times
28. 28.🧺 Which of these is needed for the pendulum? (a) a mirror (b) turmeric powder (c) a magnet (d) a heavy nut or washer
29. 29.🕰️ 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
30. 30.⚖️ 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 change it (b) we keep it the same (c) we measure it
31. 31.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a stopwatch (c) a magnet (d) a ruler
32. 32.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a sundial (c) a phone (d) a grandfather clock
33. 33.🧺 Which of these is not needed for the pendulum? (a) a string (b) a ruler (c) a heavy nut or washer (d) turmeric powder
34. 34.True or false: a mirror is not needed for the pendulum. (a) True (b) False
35. 35.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) the same hook (c) time for 10 swings
36. 36.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a balloon (c) yeast (d) a string
37. 37.⚖️ 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
38. 38.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
39. 39.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 13 seconds?
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) True (b) False

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