Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 615 · 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.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
2. 2.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
3. 3.🔮 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
4. 4.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) turmeric powder (b) a string (c) a pencil and tape (d) a heavy nut or washer
5. 5.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is wet (c) it is magnetic (d) the bob could hit you
6. 6.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a ruler (c) a stopwatch (d) a balloon
7. 7.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a heavy nut or washer (c) a battery cell (d) a pencil and tape
8. 8.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 15 seconds?
9. 9.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
10. 10.⚖️ 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 keep it the same (c) we change it
11. 11.🧺 Which of these is needed for the pendulum? (a) a stopwatch (b) a mirror (c) a balloon (d) a magnet
12. 12.🛟 What is a safe bob for a home pendulum? (a) a small nut or washer (b) a sharp tool (c) a glass bottle (d) a heavy brick
13. 13.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is what we measure. (a) True (b) False
14. 14.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) True (b) False
15. 15.⚖️ 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
16. 16.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a stopwatch (c) a magnet (d) a string
17. 17.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) heavier (c) slower (d) quicker
18. 18.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) about the same (b) it cannot swing (c) much faster (d) much slower
19. 19.🧺 Do we need a stopwatch for the pendulum? (a) not needed (b) needed
20. 20.⚖️ 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) False (b) True
21. 21.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a heavier bob (c) a lighter bob (d) a longer string
22. 22.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the weight of the bob (b) the string length (c) time for 10 swings (d) the same hook
23. 23.True or false: a ruler is needed for the pendulum. (a) False (b) True
24. 24.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
25. 25.🧺 Do we need turmeric powder for the pendulum? (a) not needed (b) needed
26. 26.True or false: a magnet is not needed for the pendulum. (a) False (b) True
27. 27.🕰️ Which old clock uses a pendulum to keep time? (a) a phone (b) a sundial (c) a grandfather clock (d) a digital watch
28. 28.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
29. 29.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 8 seconds?
30. 30.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
31. 31.⚖️ 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 change it (b) we measure it (c) we keep it the same
32. 32.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a balloon (c) a string (d) a heavy nut or washer
33. 33.⚖️ 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 string length (c) time for 10 swings (d) the weight of the bob
34. 34.True or false: a stopwatch is needed for the pendulum. (a) True (b) False
35. 35.🧺 Which of these is needed for the pendulum? (a) a pencil and tape (b) turmeric powder (c) yeast (d) a magnet
36. 36.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a string (c) a mirror (d) a stopwatch
37. 37.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a battery cell (c) a ruler (d) a string
38. 38.⚖️ 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
39. 39.⚖️ 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) the same hook
40. 40.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is kept the same. (a) False (b) True

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