Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 70 · 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 string (b) a heavy nut or washer (c) a magnet (d) a ruler
2. 2.True or false: a string is needed for the pendulum. (a) False (b) True
3. 3.⚖️ 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) time for 10 swings (c) the weight of the bob (d) the same hook
4. 4.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a small nut or washer (c) a heavy brick (d) a glass bottle
5. 5.True or false: turmeric powder is needed for the pendulum. (a) True (b) False
6. 6.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) the bob could hit you (c) it is wet (d) it is hot
7. 7.True or false: a ruler is not needed for the pendulum. (a) False (b) True
8. 8.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a string (c) a heavy nut or washer (d) a mirror
9. 9.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it becomes 4 times (b) it doubles (c) it stays the same (d) it halves
10. 10.⚖️ 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
11. 11.🧺 Which of these is needed for the pendulum? (a) a battery cell (b) a balloon (c) a stopwatch (d) turmeric powder
12. 12.⚖️ 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
13. 13.⚖️ 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) False (b) True
14. 14.True or false: a magnet is needed for the pendulum. (a) False (b) True
15. 15.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a stopwatch (c) a balloon (d) a heavy nut or washer
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.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much slower (b) much faster (c) it cannot swing (d) about the same
18. 18.True or false: a string is not needed for the pendulum. (a) True (b) False
19. 19.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a string (c) a stopwatch (d) a battery cell
20. 20.⚖️ 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) False (b) True
21. 21.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) False (b) True
22. 22.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
23. 23.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
24. 24.🧺 Which of these is needed for the pendulum? (a) a string (b) a magnet (c) turmeric powder (d) a mirror
25. 25.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a pencil and tape (c) a string (d) yeast
26. 26.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
27. 27.🧺 Which of these is not needed for the pendulum? (a) a magnet (b) a string (c) a ruler (d) a heavy nut or washer
28. 28.True or false: a battery cell is not needed for the pendulum. (a) True (b) False
29. 29.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
30. 30.⚖️ 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) the weight of the bob (c) the string length (d) how far we pull it back
31. 31.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a balloon (c) a mirror (d) a ruler
32. 32.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
33. 33.True or false: yeast is not needed for the pendulum. (a) False (b) True
34. 34.⚖️ 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
35. 35.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a digital watch (c) a phone (d) a grandfather clock
36. 36.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
37. 37.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 6 seconds?
38. 38.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
39. 39.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 12 seconds?
40. 40.True or false: a pencil and tape is needed for the pendulum. (a) False (b) True

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