Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 430 · 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? True or false: the weight of the bob is what we measure. (a) False (b) True
2. 2.⚖️ 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
3. 3.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) about the same (c) it cannot swing (d) much faster
4. 4.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
5. 5.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
6. 6.True or false: a pencil and tape is not needed for the pendulum. (a) True (b) False
7. 7.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a mirror (c) a string (d) a ruler
8. 8.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) yeast (c) a magnet (d) a stopwatch
9. 9.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) the bob could hit you (c) it is magnetic (d) it is wet
10. 10.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 57 seconds?
11. 11.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a shorter string (c) a lighter bob (d) a longer string
12. 12.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 19 seconds?
13. 13.🧺 Which of these is needed for the pendulum? (a) yeast (b) a magnet (c) a string (d) a balloon
14. 14.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) time for 10 swings (b) the string length (c) the same hook (d) the weight of the bob
15. 15.🔮 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
16. 16.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
17. 17.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 21 seconds?
18. 18.True or false: a pencil and tape is needed for the pendulum. (a) False (b) True
19. 19.True or false: a heavy nut or washer is needed for the pendulum. (a) True (b) False
20. 20.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a stopwatch (c) a pencil and tape (d) a balloon
21. 21.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
22. 22.⚖️ 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
23. 23.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a small nut or washer (c) a heavy brick (d) a sharp tool
24. 24.⚖️ 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
25. 25.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) turmeric powder (b) a ruler (c) a string (d) a pencil and tape
26. 26.⚖️ 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
27. 27.🧺 Do we need a mirror for the pendulum? (a) needed (b) not needed
28. 28.🧺 Which of these is needed for the pendulum? (a) a heavy nut or washer (b) a battery cell (c) yeast (d) a mirror
29. 29.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 45 seconds?
30. 30.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
31. 31.🧺 Which of these is not needed for the pendulum? (a) turmeric powder (b) a heavy nut or washer (c) a stopwatch (d) a string
32. 32.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
33. 33.⚖️ 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
34. 34.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 8 seconds?
35. 35.⚖️ 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
36. 36.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
37. 37.True or false: turmeric powder is not needed for the pendulum. (a) True (b) False
38. 38.⚖️ 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
39. 39.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a digital watch (c) a phone (d) a grandfather clock
40. 40.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is the one thing we change. (a) True (b) False

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