Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 305 · 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 ruler (c) a magnet (d) a stopwatch
2. 2.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a string (c) a pencil and tape (d) turmeric powder
3. 3.⚖️ 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
4. 4.True or false: a battery cell is needed for the pendulum. (a) True (b) False
5. 5.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a sharp tool (c) a small nut or washer (d) a heavy brick
6. 6.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is magnetic (c) it is hot (d) it is wet
7. 7.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a string (c) a mirror (d) a battery cell
8. 8.True or false: a battery cell is not needed for the pendulum. (a) True (b) False
9. 9.⚖️ 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
10. 10.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is kept the same. (a) True (b) False
11. 11.⚖️ 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
12. 12.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
13. 13.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a mirror (c) a ruler (d) a stopwatch
14. 14.True or false: a mirror is needed for the pendulum. (a) False (b) True
15. 15.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) slower (c) heavier (d) quicker
16. 16.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
17. 17.🕰️ A pendulum makes 10 swings in 10 seconds. How many seconds does one swing take?
18. 18.🕰️ Which change makes a pendulum swing more slowly? (a) a heavier bob (b) a longer string (c) a lighter bob (d) a shorter string
19. 19.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) much slower (c) much faster (d) about the same
20. 20.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) yeast (c) a pencil and tape (d) a heavy nut or washer
21. 21.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a sundial (c) a phone (d) a grandfather clock
22. 22.🧺 Which of these is not needed for the pendulum? (a) yeast (b) a ruler (c) a string (d) a stopwatch
23. 23.🕰️ A pendulum makes 10 swings in 30 seconds. How many seconds does one swing take?
24. 24.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
25. 25.True or false: a heavy nut or washer is needed for the pendulum. (a) True (b) False
26. 26.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) it is more accurate (c) 10 is a lucky number (d) one swing is too slow
27. 27.🧺 Do we need a ruler for the pendulum? (a) not needed (b) needed
28. 28.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we measure it (b) we keep it the same (c) we change it
29. 29.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we keep it the same (b) we measure it (c) we change it
30. 30.🧺 Which of these is needed for the pendulum? (a) a heavy nut or washer (b) a magnet (c) a mirror (d) yeast
31. 31.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a stopwatch (b) a pencil and tape (c) a battery cell (d) a heavy nut or washer
32. 32.⚖️ 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) the same hook (c) time for 10 swings (d) how far we pull it back
33. 33.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a mirror (c) a stopwatch (d) a heavy nut or washer
34. 34.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
35. 35.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
36. 36.True or false: a heavy nut or washer is not needed for the pendulum. (a) False (b) True
37. 37.🧺 Which of these is needed for the pendulum? (a) yeast (b) a battery cell (c) a magnet (d) a ruler
38. 38.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
39. 39.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a balloon (c) a pencil and tape (d) a ruler
40. 40.⚖️ 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

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