Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 891 · 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.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) it is hot (c) the bob could hit you (d) it is magnetic
2. 2.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) time for 10 swings (c) the weight of the bob (d) the same hook
3. 3.⚖️ 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
4. 4.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a mirror (b) a heavy nut or washer (c) a stopwatch (d) a string
5. 5.⚖️ 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
6. 6.🧺 Which of these is not needed for the pendulum? (a) a mirror (b) a heavy nut or washer (c) a pencil and tape (d) a stopwatch
7. 7.⚖️ 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
8. 8.⚖️ 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 measure it (c) we change it
9. 9.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it doubles (c) it halves (d) it becomes 4 times
10. 10.⚖️ 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
11. 11.🧺 Which of these is not needed for the pendulum? (a) yeast (b) a ruler (c) a heavy nut or washer (d) a stopwatch
12. 12.⚖️ 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
13. 13.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) no, hardly at all (c) it stops swinging (d) yes, much slower
14. 14.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) slower (c) quicker (d) stopped
15. 15.⚖️ 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
16. 16.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) much faster (c) about the same (d) much slower
17. 17.⚖️ 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
18. 18.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a glass bottle (c) a sharp tool (d) a heavy brick
19. 19.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
20. 20.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a battery cell (c) a stopwatch (d) a balloon
21. 21.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
22. 22.True or false: yeast is not needed for the pendulum. (a) False (b) True
23. 23.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is the one thing we change. (a) True (b) False
24. 24.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 10 seconds?
25. 25.🧺 Do we need a battery cell for the pendulum? (a) not needed (b) needed
26. 26.True or false: a battery cell is not needed for the pendulum. (a) True (b) False
27. 27.⚖️ 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) time for 10 swings (c) the string length (d) the weight of the bob
28. 28.True or false: a stopwatch is needed for the pendulum. (a) True (b) False
29. 29.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
30. 30.True or false: a string is not needed for the pendulum. (a) False (b) True
31. 31.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) True (b) False
32. 32.🧺 Which of these is needed for the pendulum? (a) a ruler (b) a mirror (c) yeast (d) a battery cell
33. 33.True or false: a magnet is not needed for the pendulum. (a) False (b) True
34. 34.True or false: a stopwatch is not needed for the pendulum. (a) False (b) True
35. 35.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 10 seconds?
36. 36.True or false: turmeric powder 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.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a string (c) a ruler (d) turmeric powder
39. 39.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
40. 40.⚖️ 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

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