Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 225 · 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? Which of these is kept the same? (a) how far we pull it back (b) time for 10 swings (c) the string length
2. 2.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
3. 3.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a small nut or washer (c) a glass bottle (d) a heavy brick
4. 4.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the same hook (b) how far we pull it back (c) time for 10 swings (d) the string length
5. 5.🧺 Which of these is not needed for the pendulum? (a) a string (b) a ruler (c) a heavy nut or washer (d) yeast
6. 6.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) quicker (c) stopped (d) slower
7. 7.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
8. 8.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it becomes 4 times (c) it doubles (d) it stays the same
9. 9.⚖️ 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
10. 10.True or false: a heavy nut or washer is not needed for the pendulum. (a) True (b) False
11. 11.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a heavy nut or washer (c) a string (d) turmeric powder
12. 12.⚖️ 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 change it (c) we keep it the same
13. 13.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
14. 14.🧺 Which of these is needed for the pendulum? (a) a mirror (b) a magnet (c) a balloon (d) a string
15. 15.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
16. 16.🧺 Do we need a string for the pendulum? (a) not needed (b) needed
17. 17.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
18. 18.True or false: a battery cell is needed for the pendulum. (a) True (b) False
19. 19.⚖️ 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) True (b) False
20. 20.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the weight of the bob (b) the string length (c) the same hook (d) how far we pull it back
21. 21.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 54 seconds?
22. 22.🧺 Which of these is not needed for the pendulum? (a) a string (b) a stopwatch (c) a magnet (d) a pencil and tape
23. 23.🧺 Do we need a magnet for the pendulum? (a) needed (b) not needed
24. 24.🧺 Do we need a pencil and tape for the pendulum? (a) needed (b) not needed
25. 25.🕰️ A pendulum makes 15 swings in 30 seconds. How many seconds does one swing take?
26. 26.🕰️ A pendulum makes 20 swings in 40 seconds. How many seconds does one swing take?
27. 27.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more accurate (b) it is more fun (c) 10 is a lucky number (d) one swing is too slow
28. 28.True or false: a stopwatch is needed for the pendulum. (a) True (b) False
29. 29.🛟 Why should you stand back from a swinging pendulum? (a) the bob could hit you (b) it is hot (c) it is magnetic (d) it is wet
30. 30.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
31. 31.True or false: yeast is not needed for the pendulum. (a) True (b) False
32. 32.🕰️ A pendulum makes 15 swings in 45 seconds. How many seconds does one swing take?
33. 33.⚖️ 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
34. 34.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) much faster (c) about the same (d) much slower
35. 35.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
36. 36.⚖️ 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 keep it the same (c) we measure it
37. 37.⚖️ 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
38. 38.True or false: a ruler is needed for the pendulum. (a) True (b) False
39. 39.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is kept the same. (a) False (b) True
40. 40.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a magnet (b) a pencil and tape (c) a string (d) a heavy nut or washer

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