Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 288 · 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 stopwatch (b) a ruler (c) a battery cell (d) a heavy nut or washer
2. 2.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) heavier (c) stopped (d) quicker
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 weight of the bob (b) time for 10 swings (c) the string length (d) the same hook
4. 4.🔮 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
5. 5.🕰️ A pendulum makes 15 swings in 15 seconds. How many seconds does one swing take?
6. 6.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
7. 7.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a heavy nut or washer (b) a pencil and tape (c) a stopwatch (d) yeast
8. 8.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we keep it the same (b) we measure it (c) we change it
9. 9.⚖️ 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
10. 10.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) yeast (c) a heavy nut or washer (d) a balloon
11. 11.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the string length (b) the same hook (c) the weight of the bob (d) time for 10 swings
12. 12.🛟 What is a safe bob for a home pendulum? (a) a sharp tool (b) a glass bottle (c) a small nut or washer (d) a heavy brick
13. 13.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
14. 14.True or false: a string is needed for the pendulum. (a) False (b) True
15. 15.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we change it (b) we measure it (c) we keep it the same
16. 16.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a pencil and tape (c) a string (d) a mirror
17. 17.⚖️ 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 weight of the bob (c) the string length
18. 18.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 30 seconds?
19. 19.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) it cannot swing (b) much faster (c) much slower (d) about the same
20. 20.🧺 Do we need a battery cell for the pendulum? (a) needed (b) not needed
21. 21.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
22. 22.True or false: a battery cell is not needed for the pendulum. (a) True (b) False
23. 23.True or false: a ruler is not needed for the pendulum. (a) True (b) False
24. 24.🛟 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
25. 25.🧺 Which of these is not needed for the pendulum? (a) a string (b) a stopwatch (c) a balloon (d) a ruler
26. 26.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a magnet (b) a ruler (c) a string (d) a heavy nut or washer
27. 27.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) turmeric powder (b) a ruler (c) a string (d) a heavy nut or washer
28. 28.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a stopwatch (c) a ruler (d) a heavy nut or washer
29. 29.True or false: a mirror is needed for the pendulum. (a) True (b) False
30. 30.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
31. 31.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is what we measure. (a) False (b) True
32. 32.🧺 Which of these is needed for the pendulum? (a) a balloon (b) a stopwatch (c) a magnet (d) turmeric powder
33. 33.🧺 Which of these is needed for the pendulum? (a) a magnet (b) a string (c) a battery cell (d) a mirror
34. 34.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is kept the same. (a) False (b) True
35. 35.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more fun (b) 10 is a lucky number (c) it is more accurate (d) one swing is too slow
36. 36.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
37. 37.⚖️ 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
38. 38.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
39. 39.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a magnet (c) a ruler (d) a heavy nut or washer
40. 40.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) how far we pull it back (c) time for 10 swings

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