Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 424 · 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? Which of these is the one thing we change? (a) the same hook (b) how far we pull it back (c) the weight of the bob (d) the string length
2. 2.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
3. 3.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) slower (c) stopped (d) quicker
4. 4.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
5. 5.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) it is magnetic (c) the bob could hit you (d) it is hot
6. 6.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a ruler (c) a pencil and tape (d) yeast
7. 7.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) one swing is too slow (b) it is more fun (c) 10 is a lucky number (d) it is more accurate
8. 8.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we keep it the same (b) we change it (c) we measure it
9. 9.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
10. 10.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a lighter bob (c) a longer string (d) a shorter string
11. 11.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 24 seconds?
12. 12.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a battery cell (c) a magnet (d) a stopwatch
13. 13.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) turmeric powder (c) a heavy nut or washer (d) a ruler
14. 14.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a pencil and tape (c) a battery cell (d) a heavy nut or washer
15. 15.True or false: a string is needed for the pendulum. (a) False (b) True
16. 16.True or false: a mirror is needed for the pendulum. (a) False (b) True
17. 17.⚖️ 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
18. 18.🕰️ A pendulum makes 10 swings in 20 seconds. How many seconds does one swing take?
19. 19.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it stays the same (c) it becomes 4 times (d) it doubles
20. 20.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
21. 21.True or false: a stopwatch is needed for the pendulum. (a) True (b) False
22. 22.🧺 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
23. 23.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
24. 24.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
25. 25.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) it cannot swing (c) much slower (d) about the same
26. 26.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 19 seconds?
27. 27.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) True (b) False
28. 28.⚖️ 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
29. 29.True or false: a pencil and tape is not needed for the pendulum. (a) False (b) True
30. 30.🧺 Which of these is not needed for the pendulum? (a) a mirror (b) a stopwatch (c) a ruler (d) a pencil and tape
31. 31.🧺 Which of these is needed for the pendulum? (a) a balloon (b) turmeric powder (c) a string (d) a battery cell
32. 32.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a stopwatch (c) a mirror (d) a pencil and tape
33. 33.True or false: a battery cell is needed for the pendulum. (a) False (b) True
34. 34.⚖️ 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
35. 35.⚖️ 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
36. 36.⚖️ 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) how far we pull it back (c) the string length (d) the same hook
37. 37.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a ruler (c) a pencil and tape (d) a balloon
38. 38.⚖️ 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
39. 39.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a pencil and tape (c) a string (d) a balloon
40. 40.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we measure it (b) we keep it the same (c) we change it

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