Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 697 · 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.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
2. 2.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) yeast (c) a string (d) a pencil and tape
3. 3.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) quicker (c) stopped (d) slower
4. 4.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is the one thing we change. (a) True (b) False
5. 5.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is wet (c) it is hot (d) the bob could hit you
6. 6.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
7. 7.⚖️ 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
8. 8.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
9. 9.⚖️ 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) the weight of the bob (c) the string length (d) how far we pull it back
10. 10.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a ruler (c) a balloon (d) yeast
11. 11.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) time for 10 swings (c) the weight of the bob
12. 12.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it stays the same (c) it halves (d) it doubles
13. 13.🕰️ Does a heavier bob change the swing time? (a) yes, much slower (b) yes, much faster (c) it stops swinging (d) no, hardly at all
14. 14.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a magnet (c) a pencil and tape (d) a battery cell
15. 15.🧺 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) turmeric powder
16. 16.⚖️ 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
17. 17.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
18. 18.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we measure it (b) we keep it the same (c) we change it
19. 19.⚖️ 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
20. 20.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) how far we pull it back (c) time for 10 swings (d) the same hook
21. 21.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a mirror (c) a string (d) a heavy nut or washer
22. 22.🔮 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
23. 23.⚖️ 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) False (b) True
24. 24.🧺 Which of these is not needed for the pendulum? (a) a string (b) a ruler (c) a heavy nut or washer (d) a magnet
25. 25.🛟 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
26. 26.⚖️ 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
27. 27.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
28. 28.True or false: a mirror is not needed for the pendulum. (a) False (b) True
29. 29.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a string (c) a pencil and tape (d) a balloon
30. 30.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a sundial (c) a grandfather clock (d) a phone
31. 31.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
32. 32.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
33. 33.True or false: a balloon is not needed for the pendulum. (a) False (b) True
34. 34.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a string (c) a magnet (d) a ruler
35. 35.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) how far we pull it back (b) time for 10 swings (c) the string length
36. 36.True or false: a balloon is needed for the pendulum. (a) False (b) True
37. 37.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a string (c) turmeric powder (d) a ruler
38. 38.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a longer string (c) a shorter string (d) a lighter bob
39. 39.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
40. 40.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed

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