Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 383 · 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.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a pencil and tape (c) yeast (d) a heavy nut or washer
2. 2.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 12 seconds?
3. 3.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it halves (c) it becomes 4 times (d) it stays the same
4. 4.True or false: a magnet is not needed for the pendulum. (a) True (b) False
5. 5.True or false: a stopwatch is not needed for the pendulum. (a) False (b) True
6. 6.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a pencil and tape (c) a balloon (d) yeast
7. 7.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) it cannot swing (c) about the same (d) much slower
8. 8.⚖️ 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
9. 9.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
10. 10.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
11. 11.True or false: a magnet is needed for the pendulum. (a) False (b) True
12. 12.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a stopwatch (c) turmeric powder (d) a heavy nut or washer
13. 13.True or false: a pencil and tape is not needed for the pendulum. (a) False (b) True
14. 14.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) the same hook (c) how far we pull it back (d) time for 10 swings
15. 15.⚖️ 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 measure it (c) we keep it the same
16. 16.True or false: a string is not needed for the pendulum. (a) True (b) False
17. 17.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we change it (b) we measure it (c) we keep it the same
18. 18.⚖️ 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) True (b) False
19. 19.⚖️ 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 string length (c) how far we pull it back
20. 20.🕰️ Does a heavier bob change the swing time? (a) yes, much faster (b) yes, much slower (c) it stops swinging (d) no, hardly at all
21. 21.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is hot (c) the bob could hit you (d) it is wet
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) the same hook (d) how far we pull it back
23. 23.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a heavy nut or washer (c) a magnet (d) a string
24. 24.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
25. 25.🧺 Which of these is needed for the pendulum? (a) a heavy nut or washer (b) a battery cell (c) yeast (d) turmeric powder
26. 26.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a small nut or washer (c) a glass bottle (d) a heavy brick
27. 27.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 20 seconds?
28. 28.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more accurate (b) it is more fun (c) 10 is a lucky number (d) one swing is too slow
29. 29.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a sundial (c) a digital watch (d) a grandfather clock
30. 30.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a stopwatch (c) a ruler (d) a balloon
31. 31.🧺 Which of these is not needed for the pendulum? (a) yeast (b) a string (c) a stopwatch (d) a heavy nut or washer
32. 32.⚖️ 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
33. 33.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a balloon (c) a battery cell (d) a string
34. 34.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we change it (b) we measure it (c) we keep it the same
35. 35.True or false: yeast is needed for the pendulum. (a) True (b) False
36. 36.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
37. 37.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
38. 38.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
39. 39.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a lighter bob (c) a shorter string (d) a longer string
40. 40.⚖️ 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

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