Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 350 · 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 ruler (b) a stopwatch (c) a balloon (d) a string
2. 2.🧺 Which of these is needed for the pendulum? (a) yeast (b) a stopwatch (c) a battery cell (d) a mirror
3. 3.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a heavy brick (c) a sharp tool (d) a small nut or washer
4. 4.⚖️ 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
5. 5.True or false: a ruler is needed for the pendulum. (a) False (b) True
6. 6.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a ruler (c) a string (d) yeast
7. 7.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a ruler (c) a mirror (d) a balloon
8. 8.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 12 seconds?
9. 9.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we measure it (b) we keep it the same (c) we change it
10. 10.⚖️ 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
11. 11.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
12. 12.🧺 Which of these is not needed for the pendulum? (a) a mirror (b) a stopwatch (c) a string (d) a heavy nut or washer
13. 13.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
14. 14.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) time for 10 swings (b) how far we pull it back (c) the string length (d) the weight of the bob
15. 15.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a balloon (c) turmeric powder (d) a pencil and tape
16. 16.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is magnetic (c) it is wet (d) the bob could hit you
17. 17.⚖️ 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 change it (c) we keep it the same
18. 18.⚖️ 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
19. 19.⚖️ 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
20. 20.⚖️ 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
21. 21.🧺 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 ruler (d) a mirror
22. 22.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) heavier (c) quicker (d) slower
23. 23.🧺 Which of these is needed for the pendulum? (a) a string (b) a magnet (c) a battery cell (d) a balloon
24. 24.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
25. 25.🧺 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) a battery cell
26. 26.True or false: a mirror is needed for the pendulum. (a) True (b) False
27. 27.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a magnet (b) a string (c) a stopwatch (d) a heavy nut or washer
28. 28.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 54 seconds?
29. 29.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it becomes 4 times (c) it halves (d) it doubles
30. 30.🕰️ Which change makes a pendulum swing more slowly? (a) a longer string (b) a heavier bob (c) a shorter string (d) a lighter bob
31. 31.True or false: a string is not needed for the pendulum. (a) True (b) False
32. 32.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) about the same (c) it cannot swing (d) much faster
33. 33.⚖️ 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
34. 34.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) turmeric powder (c) a ruler (d) a heavy nut or washer
35. 35.⚖️ 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
36. 36.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a string (c) a ruler (d) turmeric powder
37. 37.⚖️ 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
38. 38.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
39. 39.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a balloon (c) a pencil and tape (d) a heavy nut or washer
40. 40.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the weight of the bob (b) time for 10 swings (c) the string length

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