Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 586 · 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 the one thing we change. (a) False (b) True
2. 2.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 17 seconds?
3. 3.⚖️ 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
4. 4.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 28 seconds?
5. 5.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
6. 6.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) how far we pull it back (b) time for 10 swings (c) the string length
7. 7.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a heavy nut or washer (c) a magnet (d) yeast
8. 8.True or false: a magnet is needed for the pendulum. (a) True (b) False
9. 9.🧺 Which of these is needed for the pendulum? (a) a balloon (b) yeast (c) a stopwatch (d) a battery cell
10. 10.🔮 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
11. 11.🕰️ A pendulum makes 20 swings in 20 seconds. How many seconds does one swing take?
12. 12.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) time for 10 swings (c) the same hook
13. 13.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a mirror (b) a ruler (c) a heavy nut or washer (d) a pencil and tape
14. 14.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a magnet (c) turmeric powder (d) a pencil and tape
15. 15.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a grandfather clock (c) a sundial (d) a phone
16. 16.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) True (b) False
17. 17.🧺 Which of these is not needed for the pendulum? (a) a magnet (b) a ruler (c) a string (d) a pencil and tape
18. 18.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
19. 19.⚖️ 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
20. 20.⚖️ 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
21. 21.⚖️ 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
22. 22.⚖️ 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 string length (c) time for 10 swings (d) how far we pull it back
23. 23.⚖️ 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
24. 24.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a battery cell (c) a ruler (d) a balloon
25. 25.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a ruler (c) a stopwatch (d) a battery cell
26. 26.⚖️ 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
27. 27.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
28. 28.⚖️ 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 keep it the same (b) we change it (c) we measure it
29. 29.⚖️ 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 measure it (c) we change it
30. 30.🔮 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
31. 31.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a string (c) turmeric powder (d) a pencil and tape
32. 32.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a small nut or washer (c) a heavy brick (d) a glass bottle
33. 33.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) heavier (c) quicker (d) slower
34. 34.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 18 seconds?
35. 35.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is hot (c) it is wet (d) the bob could hit you
36. 36.True or false: a string is needed for the pendulum. (a) True (b) False
37. 37.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
38. 38.⚖️ 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
39. 39.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a ruler (c) a balloon (d) a pencil and tape
40. 40.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a heavier bob (c) a lighter bob (d) a shorter string

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