Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 522 · 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.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a glass bottle (c) a heavy brick (d) a small nut or washer
2. 2.🔮 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 doubles (d) it becomes 4 times
3. 3.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
4. 4.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
5. 5.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the string length (b) the weight of the bob (c) time for 10 swings (d) how far we pull it back
6. 6.⚖️ 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
7. 7.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a battery cell (c) a string (d) a ruler
8. 8.True or false: a magnet is not needed for the pendulum. (a) False (b) True
9. 9.⚖️ 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
10. 10.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
11. 11.🧺 Which of these is needed for the pendulum? (a) yeast (b) a magnet (c) a pencil and tape (d) a balloon
12. 12.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we change it (b) we measure it (c) we keep it the same
13. 13.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
14. 14.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) it stops swinging (c) no, hardly at all (d) yes, much slower
15. 15.⚖️ 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
16. 16.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
17. 17.True or false: a stopwatch is needed for the pendulum. (a) True (b) False
18. 18.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is hot (c) it is magnetic (d) it is wet
19. 19.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
20. 20.⚖️ 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) True (b) False
21. 21.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 33 seconds?
22. 22.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more accurate (b) one swing is too slow (c) 10 is a lucky number (d) it is more fun
23. 23.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a heavy nut or washer (c) a magnet (d) a balloon
24. 24.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a string (c) a battery cell (d) a heavy nut or washer
25. 25.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 8 seconds?
26. 26.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) time for 10 swings (b) the weight of the bob (c) the string length
27. 27.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
28. 28.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
29. 29.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a heavy nut or washer (c) turmeric powder (d) a stopwatch
30. 30.True or false: yeast is needed for the pendulum. (a) True (b) False
31. 31.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a lighter bob (c) a longer string (d) a shorter string
32. 32.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) how far we pull it back (b) time for 10 swings (c) the weight of the bob (d) the same hook
33. 33.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
34. 34.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a pencil and tape (c) a stopwatch (d) yeast
35. 35.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) it cannot swing (c) about the same (d) much faster
36. 36.True or false: a string is not needed for the pendulum. (a) False (b) True
37. 37.⚖️ 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 change it (c) we measure it
38. 38.True or false: a magnet is needed for the pendulum. (a) True (b) False
39. 39.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a magnet (c) a ruler (d) a heavy nut or washer
40. 40.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 45 seconds?

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